Given that the X1 won November NPD by 400k I'd say it's pretty much a given that it's gonna win December NPD too. The question is by how much? The gap is in the US is currently 700k between the PS4 and the Xbone LTD and I think this'll narrow by a further 300k in December.
One of our early indicators, Amazon, is showing that the Xbone is outselling the ps4 massively in December thus far and without any new major new games this month I doubt this is gonna change much.
Thoughts?
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right