Not very many, but does it matter? High-End PC gamers are either rich or resourceful. We've never been mass market, we're just people who want to push technology to its limits.
By the way, the build in my sig runs Crysis wonderfully for under $500.
It's HILARIOUS to see all the Ps360 kiddies say, "oh graphics don't matter!" or "those graphics aren't THAT much better!" I mean, that's what Wii owners have been saying since '06!
To truly appreciate Wii, you need a badass PC and experience the absolute best graphics available to gamerkind, then after a few weeks you reach enlightenment and realize that graphics aren't everything.