Have you made any attempt to research any of the games that are coming out on the OUYA? Let me leave a couple links here for some games that represent some of the really awesome gaming experiences you will find on the system. I want to try and break this pre-conceived notion that all you'll be getting on the OUYA are ports of mobile games already released.
Pier Solar HD (an HD version of a SEGA GENESIS game that was made in 2010!). Completely new art assets from the Genesis version, that mixes 16bit and high res HD art. Also coming to XBLA, PC, Wii U, etc.
Mercenary Kings (reminiscent of SNK's Metal Slug with some loot/crafting elements, art done by the guy who worked on the Scott Pilgrim release on XBLA/PSN)
Volgarr the Viking (it's like Ghost n' Goblins meets Golden Axe!) I'm one their testers for this and their latest alpha build is highly addicting. This is definitely a solid action platformer.
Legend of Dungeon (four-player "couch co-op", side-scrolling dungeon-crawl)
I don't think that a rebooted Genesis game really gives off the "whiz-bang" impression you're aiming for.
Its not just about mobile ports (though that does seem like a credible threat), its about ALL ports. There hasn't been anything out there that shows me that developers are interested in working with the Ouya as a priority system: everything seems to point to the Ouya being another stop in the mass distribution tour.
That of course leads to the most important question of all: why should I buy the game for the Ouya instead of one of the machines I already own? I have a modern console, a smartphone and a PC that's less than five years old: I'd imagine many people meet the same criteria (especially CAGs), and that seems to cover all of the bases that Ouya looks to capture.
XRidley said it well: the Ouya is a solution in search of a problem. I've seen people talking about how the Ouya opens the door for a "middle-market", but there already is a well-established mid-market: PC, XBLA, PSN, whatever the hell Wii U has, etc. The Ouya doesn't seem to be filling a niche so much as it just finding a spot at the trough.
It's a nifty system, but it's just so unnecessary, and I think people are over-hyping what doesn't seem to be more than another Android device.