The thing is look at the type of game software that is sold at Best Buy, then at EB/Gamestop. Best Buy (like most large retailers) carry tons of valu-crap-ware.
As for PC Gaming, honestly it is dieing, and MS is not helping with this Vista only, Games for Windows, PC/Xbox Live crap.
They took great franchises, made them Xbox only and some they dumbed down to the point it's sad. (Mechwarrior vs MechAssault for the example).
And look at Shadowrun for the 360/Vista, it's total crap. And sure lets port over a 2+year old game and then force people to upgrade to Vista just to play it.
And for someone who just recently got a 360, I have barely touched my PC except for MMO's. With top notch games like Gears of War, Forza 2, Chromehounds, Dead Rising, I'm pretty fucking happy. Then I look at my PC. For it's time it was a top notch high end rig, 2 years ago. Now I'm to the point where I'm barely holding onto being at recommended requirements for games being released.
But wait if I want to play Halo 2, or Shadowrun I need to shell out for a new rig, Vista, then on top of that Live Gold membership.
But XP is still a good PC gaming OS you say? Yeah with the wonderful amount of bug free titles the PC is getting why in the world would I ever touch a console?!? (add dripping sarcasm here)
I hate to be the one putting on the tin foil hat, but it does seem that Microsoft is trying to put a few more nails in PC Gaming Coffins. Examples would be the Games for Vista, DX10, removing stuff from Direct X to screw over one of the major sound card makers, etc.