Some people think that PC gaming is dying, but that is an inaccurate observation and a new article at PC Gamer explains why. While you can port many games to consoles, some just don't fit and others just were not made to be played with a controller. The article points to 21 PC games that you're not likely to play on a console. Among some of the author's selections: Star Wars: The old Republic, World of Warcraft, StarCraft II, EVE Online, Second Life and League of Legends.
The list also includes a number of other games, some that could be adapted to the console but likely won't be. In any case, while some MMOGs have managed to make their way to the console, the PC is still the strong province of MMO gamers and that's unlikely to change anytime soon.