Now _that_ would be very cool! I can imagine a computing device driven by solar or wind. But when it comes to solar or wind, the important part isn't energy usage as much as it is dealing with inconsistent energy output. Here we'd want to design computers for situations with varying amounts of available power. But that's much more nuanced than "low power".
> Also since data storage is constantly moving to be more volatile, complex to decode and distributed in space, we might want to start encoding our knowledge as the ancient civilizations did, in stone, but with some easy to decode language (think Voyager probe). That would be permastorage.
That too would be very cool. Not sure if you've read over VPRI's paper on digital Cuneiform Tablets [1] but it's a great read in that vein.