Addendum

Naturally they'll still have radio. Nobody will know anyone who listens to it, but somehow they'll still have it.

Retroization

Owing to the phenomenon wherein all the years prior to this become compressed into a big lump we all the past, kids approximately 120 years hence will regard television as something enjoyed during the middle ages. They'll be right.

The Superior Modern-Day Reading Experience

VR reading, except instead of having a virtual book in front of you as simple as that, there's someone sitting at a desk reading a book and you virtually read over his simulated shoulder.

An Echo of Two Thousand Years

Ennraeso paused before the gap in the unearthed wall, overcome. "Gentlemen. It was our grandfathers who began the work of deciphering the Yuyingi script unread for over two thousand years. It was our fathers who scoured the land and wandered through documents in their search for remains of that civilization formerly sorted among the annals of fancy rather than history. It is we who will consummate the great endeavor."
Terefesso, Uillanso, Iflenso, and Raalhu bowed their heads as if they only then felt the weight of their inheritance despite having contributed to it themselves through worthy exertions. The other men felt nothing of the momentary emotion, but as laborers they understood the satisfaction at the end of a long job done ably.
At last Ennraeso's agitation settled and he penetrated a silence older than history. His pace was steady and his direction sure despite the obscurations of time. The settlement had been small and built for a simple purpose, that of providing what Vgounde's limitless genius required. Nowhere but the center could have been allotted for the residence of that peerless master of wisdom and every elevated art.
Inside Vgounde's study, what they expected, what they hoped, what they yearned to find, they found. Text, inscribed in the walls, etched in tablets, and written on scrolls, everywhere text in the Yuyingi script so long lost but now reclaimed. Ennraeso, his belly a battlefield between hesitation and eagerness, took hold of a scroll and manfully unrolled it.
"I, Vgounde, leave this message for the one who will read this two thousand, three hundred eight years from today. Ahaha, what are you doing, man? Hardly anyone can read this stuff right now while I'm alive. Yeesh! Why should they learn? So they read out temple accounts when the girls pass by on the way to the well? Pfft. That doesn't impress our ladies, Ennraeso, and not yours either. I have foreseen this.
"Listen, brother. Listen. It's not too late to learn a real skill. Try saddle-making. We don't even have saddles! That's how dumb we are! You want to benefit from our ancient knowledge? Ain't got none, hahaha. Whew! What a waste of time.
"I feel bad for you, I really do, so I left one little bit of magic we have that you don't in this room. You don't need it yourself, but in eighty-three years people will think of you sometimes. All right, I have to be a little honest here or the gods will take away my gifts. They're going to declare you an unequaled benefactor of mankind and the model for all scholars. No, really, they will, but brother, this is it. You can already read enough. Now get out there and pick up an instrument. One of those deals with a bunch of parts we don't have words for. We've just got wood with holes in it, man! Haha, have a good evening, Ennraeso! Oh, by the way, your butler has already sold off most of your silver. You got pewter in those cabinets, brother."
"I thought so. I must send a letter to dismiss him," Ennraeso said, unruffled.
Finis

Addendum

In the future that feature can expand to allow people to swap your book with a better one, so please look forward to it.

Needed E-Reader Feature

In most books, changing every member of x fantasy race into y fantasy race wouldn't affect much, for which reason that ought to be a toggle included in the device itself. Writers can indicate the level of race-swap compatibility in a file included with the text.

Undersea Kingdom Categorization.

1. Formerly a land kingdom but just look what happened.
2. Currently operates like land because of magic, divine providence, supertechnology, etc.
3. Sea creatures.

Those are the categories I can think of. Do they cover everything? Watery aliens are three, ghosts and undead are one, the future is two. Atlantis one, Jabberjaw two, Snorks three. Yeah, I think that just about does it, but I'm open to correction.

Final Proof Regarding the Human Condition

It's often theorized that in the future humanity will abandon itself to virtual entertainment, shunning the real world. I'm looking at Steam charts and I don't think that idea reflects the truth of human inclinations. In particular, the games that keep high player counts often end up with mixed reviews while the best-received trail off. The fact that the real world kinda stinks will ensure people keep coming back to it.
"But what if developers, possibly AI ones, create an even more addictive flawed virtual experience?" That'll work for a time, but eventually they'll patch in some quality of life features that will ruin it. Then people will demand a classic version, and they'll get it, and they'll play it some but quit faster than they did originally, and so on till we're all back in the stadium complaining about the price of hot dogs.

The Last Spoiled Frontier

Now that we know there isn't an ancient city hiding on the moon, where am I supposed to have my bold adventurers go? Wait a minute, did I just write "on the moon?" I just checked, and I did. Sublunarian expeditions await! Until we do that too, at which point I dunno. Maybe something in Montana. Nobody checks anything that's claimed to happen there.

Sly Insertion

How do we integrate optional bosses, something unquestionably popular in games, into fantasy and science fiction books? Invisible ink is the obvious answer, but impractical. Maybe a QR code. Do companies still try to get people to use those?

Addender

Of course what we all really want is one of those Inspector Gadget books. How did a little girl and a dog get that anyway? Theft? Misappropriation of funds? Aliens? The Greatest American Hero aliens?

Technology Defeats Itself

In the future, we'll be able to play different sports on the floor, ceiling, and walls of a gym simultaneously, but we won't have to because of the practically infinite room available in space. This is only one example explaining why we don't do everything we could, but it suffices to teach the inherent tragedy of the human condition.

The Future of Valentine's Day

This will be the day when the reproduction chambers are activated. It won't be terribly romantic, but you'll be far too dead and replaced by a conditioned ultra-citizen to care.

Addendum

All books. Already you should have AIs reading everything for you, and that's only going to be more true as we proceed into science fictional realms.

Addendum

I presume we'll already have magic by then. If not, we should start with dwarves.

Grim but Inevitable Future Conflict

When genetic modification techniques have advanced to the point where we can make elves, how will we decide what interpretation to use? Decades of internecine war, of course. I'll be rooting for tall, but outside of that I can be flexible, even collaborative.

How to End Your Story

If you could figure out some way to have it quit to DOS, you should. Nothing's more satisfying than that.

The Future of War

Nobody will be able to go to war because all the equipment will be downloading updates, forever.

Addendum

The pretensions of the wood golem sect are heard by none but themselves at the time, but a thousand years later people will pine for the craftmanship and delicate sensibilities of their golems, both qualities now vanished from the world.

Competing for Status

Do you think the manufacturers and owners of bronze and iron golems snipe at each other, with the latter claiming distinction based on innovation and the former pointing to both the venerability of the metal used and its superior sturdiness compared to early examples of the latter type? Because I do.