I think Chyros has at least one video on a Kaypro board. I don't recall whether or not it had been converted to work with a modern computer.
That second C64 picture confused the heck out of me. In a few quick searches it appears that that's just a 3D render. The C64 is a home computer, not just a keyboard, and the layout is far from modern. The same reddit post I looked at about the render mentioned an adapter for the OG C64 to convert it into no more than a keyboard, called
the Keyrah.. I wonder if something such as that exists for the Atari 800. My coworker has one and I found the Hi-Tek high profile linear switches in it quite nice.
