Im not sure, at first it says can be done on a hgih end GPU, then i skipped a bit and also saw that it needs a few dedicated machines. Maybe Octuple SLI Setup (8 Cards - maybe 8 X2900XTX's ?)(With about 20 C2C E6600's)
I wonder how many people would spot that i put SLI setup, then used an ATI crossfire card fro an example. .
Ray tracing is awhile off, 1 graphics card struggles anyone who has used MAX and put ray tracing on knows how taxing it is on the system. There was even word of having a separate ray tracing card like there is now physics. Ray tracing will happen on a graphics card but it wont be soon.
(Im sure i`ll eat my words sooner or later and a card will come out that does ray tracing in games with no trouble )