I'm not sure what killed it, but I think we can say its now dead. This is a historical date for the fall, much like a dead empire, parts will live on, but in some distant future they will say 'this was the day'.
I thought, perhaps, it was not dead but having a resurgence. Crysis, COD4, Orange Box, Unreal tournament, Quake Wars.......
But it was a chimera, these were all FPS's, and all competed against each other as well, making the sales of each lower.
It was the xboxification of Oblivion which signaled the end, but the rot has been creeping for years.
Where are the space games? Where is the improved AI? Where are the virtual worlds?
We've been getting better graphics and the same games for years now, and lately not even the quality of those games in the past.
But whats prompted me to write this now? It could have been written last month, it could have even been a year ago, maybe two, but why now?
Behold...
http://pc.ign.com/articles/851/851255p1.html
http://pc.ign.com/articles/850/850118p1.html
There is so little to review, that IGN is now reviewing 10 year + old games.
Games that had better stories and design than most released today.
Its over.