everything will depend of June.
If X1 doenst win june by at least 100k, it cant win in the Usa ( remember they have to catch a difference of 500k(and soon +600k) with the PS4) and they have nothing bigger than Titanfall (that didnt beat PS4)except a remake of Halo 2, so if the price cut itself doesnt make it win, nothing will (it will be too late in December 2015 )
Predictions for end of 2014 HW sales:
PS4: 17m XB1: 10m WiiU: 10m Vita: 10m