I was about to agree with Howard, until I checked on pricing for Android devices based on the Tegra3 processor.
These are still in the $300+ range, and no included gamepad. If nothing else, the OUYA will have a market based on the price point (if it goes out at $100) and the "ready to play" nature of the package. The "no development restrictions" will definitely encourage third party development, but I highly doubt that any officially sponsored marketplace will have that same lack of restrictions. Too many possible legal liabilities.
As for the controller, that's one piece of hype I'm not currently ready to buy into. Everyone has their own idea as to what the "perfect controller" is, and I'm sure it won't universally satisfy. After all, think of all the third-party controllers for just about any video game system ever made. The folks who designed those thought they were great as well, and a lot of them got severely panned.
Still, it was this kind of open philosophy which got me to purchase the GP2X so long ago, so I suspect I will have some interest in the final product. But I'll probably wait to see some of the potential realized before buying. Who knows, by time the rubber meets the road on this one, there could be other contenders in the same market, worthy of consideration.