Battlefield is exclusive for now I believe, as is Call of Duty. Once ps3 is out they could get a port instantly (or the next game in the series...). There's no such thing as an exclusive EA game is there? The next need for speed game will be on ps3, etc...It's only exclusive because ps3 isn't out. If it was out right now, it would have versions of everything from EA, COD, Battlefield, Tony Hawk, etc...
Now let's talk about the games that sell consoles...Halo 3, Call of Duty 2 (by default, it was the best launch title, too early to tell if it's going to continue selling well), and Gears of War. That's it.
Sony has DMC 4, Final Fantasy, MGS 4, Tekken, Gran Turismo and Warhawk just from that tiny list. Plus you've got a bunch of other proven franchises. Sony's got a lot of top-selling franchises that microsoft just doesn't. MS has a more "Sell by committee" approach which is good, but not great. I loved games like Crimson Skies and Rallisport Challenge (and part 2), but if you don't make sequels to games that people like, you can't ever hope to build a series. They keep trying to sell us on new franchises instead of sticking with the ones that enjoy mild success and let them grow. A Crimson Skies sequel would sell VERY well on 360...and it's nowhere in sight...