There has certainly been little shortage of PC titles making to move over to consoles over the few generations, This current generation of machines has hosted a few formerly PC-only games, such as Civilaztion Revolutions, and previous rounds of consoles have taken hold of PC hits, such as Doom and Quake. However, there are still a vast number of games that remain wholly exclusive to PCs with nary the announcement of making the jump.
Many developers have their reasons. Current consoles maybe just don't have the horsepower to handle the best representation of a game, such as Crysis/ Other games perhaps don't lend themselves to the game controller, although clever decisions have managed to weaken this argument in recent years, such as the aforementioned Civilization Revolutions. And with that game as a prime example of how to re-jigger a game for the controller and remake an interface for a whole differ class of game, IGN has assembled a list of 10 PC games/franchises they would love to slide in to a console very soon.