its not just exclusives though, and i wasnt really referring to exclusives.
look at games like AvP and Modern Warfare 2 for example... AvP was a direct port that wasnt optimized for the pc at all and for awhile played like shit on PC's, and infinityward basically told PC players to go 'eff themselves.
personally i dont really care- i mean, im a console player through and through; prefer consoles in almost every way. but im just sayin, the pc gaming market is kind of going down the drain imo
i dont really think the pc game marker needs to "step it up" though, because it doesnt really have anything to do with the games that are on PC's. games that are on PC tend to almost always be more critically acclaimed then any console they also play on due to mods and graphics and stuff, and even if a pc exclusive killer app is made its not going to help sales... the truth is that as already mentioned console games sell better. as long as pc's cost a thosuand dollars just to run the game at a decent frame rate, and are susceptible to virsuses and all the other things that plague them, consoles will simply always sell more games.
starcraft 2 is one of the most anticipated games of the decade, and WoW is one of the most played games of all time... but hardly anyone ever decides to skip on buying an xbox or ps3 or wii and instead upgrade their pc to play those games. people will buy a console just to play halo or final fantasy or w/e though, for example.