it will be fucking amazing if the X1 cant win the Holidays when its releasing all of its exclusives over the course of the last 3 months of the year and will likely get another pricecut or other great deals, the PS4 already released a bunch of exclusives this year and will release some more before the holidays leaving only the Uncharted Collection and some japanese exclusives for the Holidays, they are games that will move some systems but not at the same scale of the competitors, i mean they are releasing a new Halo (the biggest game on the system) a new Forza and New Tomb Raider, those are all big games that combined with another price cut or deal it will surely sell more systems this holiday than the PS4.
And while Sony has some partnerships with some Multiplats this holidays i dont think that will move as many system as having big exclusives for the end of the year.