It depends entirely on software, the ps1 and ps2 were cheaper and far less powerufl yet they recived msot of third party support. Going by rumors next gen wont be such a high leap on raw power and everyone might be playing on the same ground. There's also the facttha wiiU launching first and probably getting the lowest pricepoitn by the time all 3 are out.
I dont thik they will have wii sales now, but i dont see them ending on 3rd place yet. If they have the right software they will succed.







