"That's because those two are/were the only big third party exclusives that Sony has/had left."
Well, the 360 doesn't have much left either. What two games? And one of those destined for a Metcritic score in the mid eight range.
With its much stronger lineup of internal studios, Sony wouldn't have to be concerned by only have two big third-party exclusives left. However, they have more than two exclusives left: FF versus XIII is an exclusive, Kingdom Hearts III could still be on its way to the PS3 especially in the light of Disney's recent big endorsements of the blu-ray technology, and Kojima's next game will most likely be developed as a PS3 exclusive. Also Final Fantasy XIII which has been developed from the ground up as a PS3 exclusive will remain a much better game than the 360 port will be.
My most anticipated games: Whatever Hideo Kojima is going to do next, Final Fantasy XIII, Final Fantasy Versus XIII, Gran Turismo 5, Alan Wake, Wii Sports Resort. Cave Story Wiiware.