Imho, xbox is going to lose january and all the years util Halo lauch. The effect "need to buy xbox fast, because they are in the middle of a promotion." is over, now people just see the $349,99 X1 and think, "hey, i can have this price at any time..."
$50 dollar advantage isn't enoght, Ps4 will win USA from JAN - SET , just see the line of games, Ps4 is going strong as hell and Xbox just used the majotity of the Gás ( util Holidays, they have some realy big things for the endof the year!)