Its because PS360 owners feel that the fact that alot of games that flop on the wii are just demonstrating that it has yet to prove that it can sustain a plethora of genres. While 3rd party sales of all genres have sold well and continue to sell well on the PS360/PC the same "cannot" necessarialy be said about the wii.
BTW this is NOT my opinion :)
Long Live SHIO!







