I think Xbox will beat PS4 handily in the US for December, and honestly, I think Sony deserves it. They had ONE bundle for the holidays. One. And they didn't even make a bundle with call of duty? Or a bundle centered around children e.g. Ratchet and clank bundle? Crazy. Meanwhile, Xbox had a bundle for everyone.
I think Sony not only stands to lose their momentum in the US, but also stands to lose activision as a partner. If I was activision, I'd be pissed. Their major competitor, Battlefield 1, had its partner promote the hell out of it. Commercials and ads galore, Xbo bundles, special edition battlefield 1 Xbox ones, etc.
I think Sony really crapped the bed this holiday, and I just don't get their decisions and approach.