What's the AI product nobody has thought of yet? Ethics aside, 50 years out, invent one and say who'd pay for it

I'm not asking what's on a roadmap. Everybody already knows what's on the roadmaps, and that's the boring part. Take the raw capability as a given. Whatever you think it can do today, plus whatever it obviously grows into. Then answer the harder question. What does somebody make out of that which isn't on anyone's list right now? Not a better version of something that exists. A category nobody has named yet. Two asks, only so this doesn't fill up with one-word answers: Say roughly how it works. Enough that I can picture the machine. Say who wants it badly enough to pay for it. That's usually the part that separates a real product from a cool idea. And set ethics aside on purpose. Not because it doesn't matter, but because "should this exist" is a different conversation from "what will somebody make," and it swallows every thread it gets into. I'll go first so nobody else has to. Memory correction. Not a chatbot of the dead, not restored photos. You hand over your whole archive of a person, every video and voice memo and thread going back thirty years, and it gets re-rendered. The bad year comes back warm. The fight never happened. It's handed back as your own footage, same lousy camera work and all, and after a few years of watching it that's the version you have, because that's how memory works anyway. The buyer is anybody who lost somebody badly, which is eventually everybody. I've never seen a company announce anything close to it, and I can't work out what would stop it. What's yours? Stranger the better, as long as you can say how it works.