They claim 10h battery for ODroid Go Super! I wonder how difficult is it too develop a game for it though... I've had a dream of making/playing an MMO that's exclusive to a handheld console.

Although I would prefer something even low power/more battery power, maybe even a monochrome display. Anything so that you can reach the point where you don't have to think about the battery.

The fun part of the Odroid Go and the Go Advanced was that it was DIY. So if you have a kid, you could spend time building it together then work on programming it together... Losing the DIY makes it less interesting and fun I feel.

You can still find some for cheap on ebay. I really recommend it.