Asking the obvious question: What should I use that for? (The computer, and Forth too)

Its power consumption is ridiculously low; IIRC, at full utilization, it can be powered by a solar panel the size of your hand.

Some people use them (or a sibling) in space http://www.cpushack.com/2014/11/12/here-comes-philae-powered...

I guess dead simple design, low consumption is attractive here.

Green Array Chips architecture is quite interesting.

Perhaps a natural question, is there a software framework that mimics this way of building horizontally scalable services?