Wouldn't it be marvelous to feel the SLI power on Crysis 3 & metro Last Night in the next year?
I have my doubts Crysis 3 will be super demanding. Crysis 2 is not. I play that with the DX11 patch and textures, maxed out in 3D vision on a single 680 at 60 FPS (max FPS in 3D).
Metro may be different. What I'm getting at is with 1080 @ 60hz, the 2nd card will rarely matter, but if he's using 3 monitors, 1440p resolution, 3D vision, or 120hz, then the 2nd one will definitely see use. That was the question he posed. The 2nd card only scales well if the monitor setup pushes it.