Considering that both games have sold tremendously well (Wii Fit at 6.96m, Mario Galaxy at 6.86m) I'd say that there's plenty of room for both core and expanded audience games on the Wii.
There is 1 360 game (Halo) and 0 PS3 games that have sold as well as either.
End of 2008 totals: Wii 42m, 360 24m, PS3 18.5m (made Jan. 4, 2008)







