I saw the gameplay vids and i personally dont see anything special about the game. It just looks like the CoD on somewhat bigger maps (not BF kind of big though) with possibility to play inside a mech/titan, which seems to be sort of replacement for CoD killstreaks.
Now dont get me wrong, i am not saying its going to be a bad game, nothing like that, i actually like and played Call of Duty a lot over past few years, recently bought and played Battlefield 3 a bit, but i have read things about TitanFall how its going to move the limits of the genre again and how novel its going to be compared to same old CoD - but frankly, i dont see anything novel on those vids.