Sorry, but Wii U will not sell anything close to PS4. And it pains me to say that, as a big Nintendo fan who has never been fond of Sony's gaming stuff.. But despite being a Nintendo fan, I am also a realist.. (It has a chance to outsell Xbone, though, based mainly off Nintendo's huge advantage over MS in Japan and somewhat in non-UK Europe).
However, if we're talking 3DS + Wii U vs PS4 + Vita, the race becomes far more interesting and more close. I believe it will be something like:
3DS: 100 million + Wii U: 50 million
vs
Vita: 40 million + PS4: 100 million.
So, very close, but Nintendo's two consoles will barely edge out Sony's two consoles when combined.
Wii U is hard to predict as it will largely depend on which direction Nintendo plans on going down with its Wii U games. If they intend on continuing the more Gamecube style niche games they've mainly released thus far for Wii U in 2012 and much of 2013 (Zelda WW, Nintendoland, Wonderful 101, Bayonetta 2, Pikmin 3, etc), then they are doomed to reach sales of no greater than 30 million. However, if they continue with the more oldschool/Wii style games they seem to be headed towards in 2014 with games like Mario 3D World, Wii Fit Plus, Mario Kart 8, Smash Bros, DKC, etc.. than I think 50 million is a safe bet. Luckilly, I think Nintendo is beginning to wise up and focusing far more on the latter, hence my 50 million Wii U sales prediction.







