I have to agree with Jerykk on this one, if you call yourself a PC Gamer you would have to be a very very blind one not to see the trend of game development these days.
Developers are shifting to consoles where there is more money and where mediocre games (that require far less effort) actually sell a shitload of copies.
That being said I dont think PC Gaming will EVER die, it can't really. It might not be on the bleeding edge anymore but then again maybe this is not such a bad thing.
I also think that Gabe Newell isn't talking out of his ass, Valve makes games for PC Gamers, quality games that aren't maybe as advanced as gamers are used to but they cater to a specific audience and as such make a lot of money. I think they are also indirectly benifiting the fact that with so many developers making consoles their lead platform, they are loosing a lot of competition which is a good thing for them.
Then there is Steam which is the future of PC game distribution, not Steam specifically but digital distribution in general. I think that small development studios will create and release games exclusively through digital distribution, thereby bypassing publishers and distributors and making more money (even though they might sell fewer copies of their game)
I have a nifty blue line!