I prefer FPS on PC because you can reactor faster and more precisely; using the entire arm, as opposed to just the two thumbs. I'm left-handed, though, so I'm not sure if that makes a difference.
I never felt that PC gaming was ever close to dying. For one, you can't type on consoles anywhere as affective as online. And that also brings me to point out MMORPG's. Really popular these days. And I doubt they'll go down any time soon without a proper fight.
Looking forward to Starcraft 2, Diablo 3, and All Points Bulletin, at the moment.