Aerys on 22 May 2014
anyone thinking Wii U will be ahead lifetime is too young to understand how things work.
You can think Wii U will be ahead during it's lifetime, it is possible maybe, but it wont during all the generation, because PS4 will last longer.
It's insane to think a 4 year console(be realistic) with 1-2 big system seller only by year will outsell a (at least) 6 year console with all 3rd party support
Predictions for end of 2014 HW sales:
PS4: 17m XB1: 10m WiiU: 10m Vita: 10m
