I will jump into the "Neither will happen" bandwagon.
The maximum I can see the PS3 reaching is 95m (and I think that is a stretch)
And about the Wii U, well.. I was counting with a price cut (and Zelda) to push its sales. But after Zelda's delay, and after seeing how Nintendo is dead on set on maximum hardware profit; I highly doubt that the system is ever gonna reach the 25m.