Wii U is at 3.6 million sold a of end of June. It's no Wii, but that's still 3.6 Million users... providing Wii U isn't a break down machine like the 360 and PS2.
Where as people want Ouya(like myself) and the sales I think are only in the 100k. See if Ouya will get more later :D
Wii U is a viable sales platform.