From the top of my head the 3rd party exclusives (console exclusives +_-) I can think of are:
Left4dead
Mass Effect/ Mass Effect 2
Final Fantasy Versus
Star Ocean 4
That is pretty much all the games I can think of which are 3rd party and said console company does not own the IP. Of those listed, which do you think will remain exclusive? Left4Dead and Mass Effect franchise just looks a given to be multi-platform, EA have no reason to keep games exclusive so dont see why those 2 games would be special cases. SO4 also seems a given just looking at the 360 install base in Japan and demographics.
Now FF Versus, that one is very interesting to say the least. I think that one will actually stay exclusive if PS3 exclusive JRPG such as WKC sell well, IMO the decision will be made by looking at sales of that game. Of course there is FFXIII as well, if the 360 version sells huge numbers I see no reason why Versus will remain PS3 only. Apparently the director of the game Nomura is a Sony fanboy but Kitase is also one and could not keep FFXIII exclusive, what Wada says goes.
