I have heard nothing new out of Green Arrays but the site still seems to be selling the boards. If I had free cash available I'd try ordering one just to see. It's a really interesting concept and I'd love to see it developed.
Forth is great, but colorForth takes it one step to far.
It is very difficult to know when to not add a seemingly cool feature. Specially when you where right against most odds before.
[0] https://en.wikipedia.org/wiki/ColorForth
[1] https://ratfactor.com/forth/the_programming_language_that_wr...