Two big things will hurt CoD on XB1 this time around :
(1)- A very significant gap is now there in US install base for PS4 over XB1. People that play online games are more likely to move where they know more people are headed, or purchase the same console that friends and family have already moved to.
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(2)- 720p Ghosts, and now 900p (?) COD:AW on XB1 vs. 1080P PS4. The story is retold every single major multiplatform title : the XB1 version is inferior. Regardless of how serious the actual gap, which varies from title to title from insignificant to fairly large, it's bad PR and bad mojo for XB1. Few neutral people when given the choice of equally priced versions will be happy to buy the 'lesser' version.
But :
Microsoft could spend a bunch of money for huge marketing/exclusive content for the XB1 version, in which case the gap might be pretty tight. Still, it's hard to overcome both a big install base gap and quality gap with just that.







