I've followed the SF franchise since SF2 released in the arcades. I'd buy it for Wii, but don't have PS3/XBox360, and I'm guessing there are others in the same boat as me. The 'classic' franchises should do well, because of lot of the old NES/SNES fanatics from the 80s and early 90s now own Wii's.
Hardware is only a means to enjoy great games!