Seems we are mostly all agreed the ps4 will have a fantastic year, approximately doubling its numbers. It will have a larger catalogue of games and no doubt a price reduction and there may be new developments coming in like a VR headset that may be officially announced if not launched this year. While I don't have a ps4 yet I'm building up a library on psn plus for one and expect to get one sometime this year.
I think its more interesting what will happen with wii u and xbone. Microsoft had a brilliant fight back to get back in the game but Nintendo seems to have given up on wii u. Those numbers are less easy to predict.
My prediction for 2015 year end is;
PS4 39m
Xbone 22m
Wii u 13m
Despite being a wii u owner myself I just can't see the wii u doing well this year. I'm only expecting to make 2-3 purchases for it myself and now with a complete lack of third party major titles I just don't see many buying it. It desperately needs a re-designed controller but not sure Nintendo will invest in it as the underlying console hardware is so weak and that won't restore third party support.
I think wii u will get even more marginalized this year with more retailers not stocking it. I think Nintendo have left it too late to fight back and will be forced into more aggressive pricing this year just to keep sales ticking over at low levels.
Microsoft will continue to offer exclusive titles in a console close to ps4 performance and do well in distant 2nd place but I feel as more aggressive pricing comes in European sales will recover.
