That's really cool, I would definitely be interested in a "normal" keyboard that had this kind of layout as a guitar player. Needing to remember different hand shapes to play a major chords took a long time to get used to - would love to be able to just "slide up" the shape like you do on guitar with bar chords.
The House of the Rising Sun test of the commercial version of this keyboard: https://www.youtube.com/watch?v=IlZv13YZzSM
I'm also primarily a guitar player. I picked up a piano accordion earlier this year, and I'm wondering if I should've gotten a button accordion instead[1]. A linear piano layout is just hard to wrap my head around, hahah. I guess it's probably good to learn, though, so I'll stick with it.
[1] Piano accordion on top, button accordion with isomorphic layout on bottom: https://commons.wikimedia.org/wiki/File:A_converter_free-bas...