There are a number of apps that do this.

Any path it could possibly take is equally unlikely.

Get Out.

The story is called "The Big Hack" and was run by Bloomberg in 2018. All the major companies named in the story conducted investigations and never found anything, but the story was never retracted.

https://www.bloomberg.com/2018-the-big-hack

wonder who got short-options on SMCI in 2018 :)

This would still have tactile feedback because you would still be playing a piano. Imagine things like scales being overlaid in a different color where your fingers are supposed to go. Maybe if you hit the wrong key it would flash red. There's all kinds of things you could do.

Ah, so you want this for lessons on a real piano? That seems oddly specific. Far cheaper to get one that has midi capabilities and use any of a number of great apps out there.

I grant that if you can afford a full size piano, you probably don't balk at this thing, though.

Agreed, and any app that's genuinely good will be purchased by a high percentage of early adopters.

Apollo implemented this as a feature last year in fact.