To be honest, I'm buying an Ouya, and I'm going to use it to play emulators, run XBMC, and play whichever of my Android games can be coaxed to run on it without too many expensive additional apps. I expect I will cough up the five or six bucks to get some software to emulate touches from a game controller, which might even end up being a PS3 controller.
I am not even considering giving Microsoft or Sony my money in this generation. Ironically given how long I've hated them, Microsoft could have a chance at it eventually (when the device has had its price reductions, down the line) if only they would make Xbox Live multiplayer free. Or if this Azure linking actually paid off and they really provided something for your low low fee (and Live can be had for truly little money once or twice a year) and you got low lag servers running on their cloud computing service rather than getting to pay for shitty multiplayer matching and then getting to host the game over your consumer-grade internet connection as well, I might actually consider paying for Live.