I'm not going to predict numbers but the I think the order will be NSW>X1>PS4.
switch will continue it's insane momentum.
last month xb1 was on ps4's heels, and this month the discounts will push it up and over.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.