A computer running Linux, about the size of a USB stick, for $25...
http://www.geek.com/articles/games/game-developer-david-braben-creates-a-usb...
See also...
What seems to be missing from the "provisional" spec is some sort of network interface. Curious, since the software includes Iceweasel (a Firefox clone/fork).
Anyway, it may be about a year before we see these in production, so a few things can/will change before then.