I think i read today (cant remember the source) that both the XboxOne and PS4 are having pre-orders ahead of their previous console launches.
So while that's certainly a good sign, after the retail "Wii-u" will sell out/has sold out... I will wait and see what both consoles do after they have launched. There is still a massive recession on, and though i think the initial orders might be ok, I do think both may drop off quite quickly.
I would say that if there are any stock issues for either, or scalpers buying up stock (which seemed to happen a lot on the wii-u), then this could also greatly impact its 3-6 month sales.








