Here you go, fixed hardware, open source development friendly and cheap too.
A very 'Amiga like' business model in fact.
Ouya
Bought one of these in Jan. When will it turn up was promised April. Still nothing, there is a huge amount of lies coming from the Ouya team.
Would I recommend buying it, no.
Just check out the reviews, controller lag, buttons sticking. Incomplete store/OS/games, onboard NIC not working, weak wireless. The lying and hiding of shipping details and other things.
Maybe one day I'll receive it, I'll be rooting it and using it as an Amiga emulator.
http://www.reddit.com/r/ouya/