It's probably on a similar machine...this is a work in progress currently shown though, the fps will be higher, not choppy, etc.
And this is DX9, I know that. They may be using a DX10 card like an 8800, but they showed this level using DX9 to show that it can still look freakin awesome without DX10.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )