It will for most of this year... especially the next two months before e3.
Everyone who was willing to buy an XB1 at a cheaper price with Titanfall already did. Price has mow increased and the hype has died down. PS4s are now available. MS has no exclusive games for a while. PS4 has MLB, Spider-man, Bound by Flame which will keep it number 1 in the US. Watchdogs will also sell more consoles on PS4, even if it is just 1, it will keep PS4 #1 in the US and probably selling 3 to 1 outside of the US.
Rough few months for MS until they decide to formalize their price drop