The thing about the X1 is that it started out pretty bad, yet still managed to get a lot of sales. Microsoft has PLENTY of room for improvement for the next year or so; more exclusives to announce, price drops on their console, a possible kinectless bundle, more XBL Games with Gold, and so forth.
The PS4 and Wii U can't do a price drop because both consoles are selling at a point where it's not a loss to them, X1 however can drop price.