I think 3rd party will not decide who win the next generation i expect much more less 3rd party exclusive so first party will decide the leader of the next generation.
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m







