@ omgwtfbbq )
I think , that Wii sales will decline rapidly after 3 years , while PS3 sales remain constant on a good level (better than todays) and that Wii will see it's successor (which will abruptly kill nearly all sales) about 1 - 1 1/2 years earlier ,than the PS3.
That's only my opinion how this will go on ,but time will tell.