So the person who doesn't have an SLI setup won't be able to fully enjoy the game? Also in my SLI setup, one of the cards does apparently act as the Phsyx Engine. I'll take a SS of what I mean when at home.
I don't know if I'd go so far as to say that SLI owners wouldn't be able to enjoy the game. I was just thinking about people like me, who have AMD cards. My 7950 has no problems turning up all the bells and whistles on modern games. I was just thinking of what else could be done if I dropped in a second 7950, but has it utilized for non-graphics tasks, to offload as much work off the CPU (and maybe even the primary GPU). I was just contemplating what other tasks/improvements could be made to games, by mearly using the power of the second GPU to add things to enhance immersion, not just extra eye candy.