Well it could be anyone. If ps4 keeps the momentum then it will be them. If the x1 gets a pricecut and titanfall delivers along with halo 5 we can see the x1 selling well. The wiiU is getting mario kart whoch saved the 3ds and look at it now, also it might get SSBU which is also a system seller. As of right now the ps4 looks like it will finish 1st by the end of 2014, with x1 and wii u going for 2nd