People seem to forget that ps2 was selling better then xbox and xbox360 and ps4 is selling like PS2 so X1 has no chance to win in USA,one games won't change anything
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