Yeah, I think they're even more minimalist. It's an interesting design space, but hard to see it taking off, especially with few developers comfortable with thinking about the kind of minimalism required to take advantage.of these kinds of chips.
Completely agree, it's an almost total shift from everything that's in use these days. Very interesting to play with though, I'd love to see some real world use.
Chuck Moore has a talk on it here, very interesting stuff: https://www.youtube.com/watch?v=0PclgBd6_Zs
I'm not sure how far this has gone since then. The site is still up with buy links as well: https://www.greenarraychips.com