The article in that link states they feel they are at the point that 3DFX was with video cards. I take that to mean the technology is barely beginning, and I think you guys are right, as systems grow to quad and 8X core systems, the physics will be handled in a different way, and having another card in a slot will be a thing of the past in a hurry.
It will be nice, though. The more realistic, the better
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