Oh the irony, since the new MacPro will leave out the awesome NVIDIA graphics cards completely. Check out the article at FCP.CO, which actually says it is to speed up FCPX and Motion, though is actually more about the upgrade and flashing the card.
He even used a PC model like my 670 (though I did a 670 because of possible power issues with a 680, so though the Mac Version would be safer), though he was able to flash it into the Mac version so he gets the boot screen.
And honestly this is better for Adobe software as you get great CUDA support with it.