Some impressions on the games that you mention:
Titanfall: Available on PC, but more importantly available on X360. Will shift XBO but not a massive amount due to that.
Fable: I feel fable is dead at the moment, they need to either mature it up a bit or do something different (in fact rumour has it that Lionhead are working on something new).
Gears: From many on the internet, I get the impression that many Xbox owners don't much care for gears that much. Though of course the users on the ground might have a different idea.
Halo, well Halo will do very well I am sure.
So I think out of that lot TitanFall and Halo are the big titles the rest are on decline... and will not shift that much hardware.
So MS may win MS, but not with GOW... and I don't think the gap will be anywhere near what it is on PS3/X360.
Making an indie game : Dead of Day!
