Okay, I'm not much of a gamer, but geez, you have to check out this machine - The Xbox 360.
This thing is going to be faster than any computer on the current mrket. We're talking, and I quote, "The systems overall floating-point performance will be 1 teraflop."
"three symmetrical cores running at 3.2 GHz and a 1 MB L2 cache that can perform 9 billion dot product operations a second."
I want a desktop configured like that.