Cant see a justification to have all 3 to be honest - I mean how many 360 steller exclusive titles will be out next year?
may miss one or two but i'll get over it with titles like MGS4, GTA4, LBP, Home, Mario Kart Wii, SSBB, NMH
They'll be more than enough in PSWii lineup to ensure I dont covet the 360 titles I reckon.