XB1 has a Madden and Gears of War bundle this month. That should give it a boost.
Its a wonder that Microsoft don't have gimmicks, like the Playstation limited edition faceplates. Those are obviously working in an apple - New colour kind of way.
Out Aug 18th XB1 Madden bundle - #473
Out Aug 25th XB1 GOW Ultimate - #2,975
Out Sep 15th PS4 Taken King - #12
It will be interesting to see how the hustle and bustle changes nearer to release and whether the Destiny pre orders will eat into August NPD numbers.