I agree but I don't need the keys look anything. The best thing happened to my keyboard life so far was having to use a keyboard without the letters of a language I used daily drawn on it. I would rather buy "das keyboard" with purely black keys but it doesn't have enough keys for me to invest in.

However, I would love to have your software-defined visually configurable keyboard as a second one on my table and every app using it as a sorg of a "toolbar" / command palette. This was what Apple tried sort of (it would have been nice idea if they didn't sacrifice a real keys row for it). To me it sounds like an additional display with touch support can do the job.