Nah, PC gaming's not dying (and like mookie said, the death of PC has been anticipated for a decade already).
Both Magicka and Minecraft really shot indie games to public knowledge and now you see them everywhere. You got sims like the Eagle Dynamics' DCS series, A-10C just came out and they are already planning/working on the 3rd DCS game. How about WWIIOL? Or Armed Assault? While not hardcore sims, certainly something unique for PC.
Then there's the games that are multiplatform, but their life is extended greatly by modding in the PC version (Morrowind, Oblivion, Fallout 3 springs to mind first).
And lastly, strategy games. Combat Mission, Close Combat, Hearts of Iron, the ridiculously overpriced Matrix Games' "epic" war games.
PC has everything for everyone. Consoles don't.
