It's because the games are shit
End of. OK, OK, PC gaming is dying a death thanks to the rise of stupidly powerful console, along with the rise of stupid DRM that continually punishes PC gamers for not being console gamers.
But seriously, how crap are the games these days? Aside from the next Call of Duty or God of War game, what is there to look forward to? What game took your breath away last year and threatened to take your social life with it?
Games just don't draw me in any more. They're high on production values and graphics, and low on innovation. (And before you say it, the Wii turned out to be exactly the useless fad I thought it would be. 101 mindless party games for 6 year olds? No thanks.) I've started playing a lot more "retro" games, because they're simply more entertaining. The occasional game breaks through with great appeal, but on the whole they're bland, generic, and not worth 40 quid a pop.
I know my expectations of games are high - I lived my teenage years straight through the Golden Age of Gaming, and it was *awesome* - but 90% of the crap put out for the modern market simply isn't worth bothering with.
Much like Hollywood, in that respect...