You can't be serious. Although you can very soon be enjoying the next-generation gaming experience, what's exciting to me about this as a PC gamer is that all next gen games will be designed with x86 in mind, which should make porting trivial compared to this generation.
I'm an early adopter of the same hardware you're all going to be enjoying this christmas, and many of the same games. Plus, I get a Virtual Console offering that Nintendo/Microsoft/Sony only wish they could match, and a television experience with Sickbeard/XBMC that not even Netflix can match, let alone whatever soon-abandoned toy Microsoft will be including with the XBO.
You're absolutely right; Microsoft/Sony adopting the X86 platform for this generation is a perfect storm for Valve; release a Steambox running linux, and you can minimize the cost of porting to 20% of what those same efforts would require coming from a PPC architecture.
And these days they mostly don't even bother to do anything...