I'd buy it if I could use it as a dumb bluetooth keyboard. As it stands he's ambitious for a vision that has no use in my life—I'm generally trying to escape digital interaction, not constantly immerse myself in it.

It'd be interesting to try it as a regular keyboard too. Probably a bit too imprecise even for skilled users, but who knows.

And if you really get into them, maybe it's worth spending the time to learn chords instead, like for a court stenographer?