I really don't know, but I tend to doubt it.
Quite a few PS2s had to be rebuys, either because of the faulty early consoles or because of updated models. Wiis seem more reliable, and you can't really come out with a Wee Wii.
As well, I think that the 360 is going to move more than the XB while the PS3 ends up moving a few more than the GCN. The market's going to have grown, but how much?