Quote: "Yeah, surely having a GPU do the Graphics + Physics is just as bad as having the CPU do other stuff + Physics? The whole point of having a separate unit is to make it fast and dedicated... and that's somewhat destroyed if the GPU has to perform two tasks at once in my opinion"
Wouldn't be an issue with sli, since you could potentially dedicate a card to the task, or use whatever power is left over to help render the scene.
In reality it's more efficient use of the card's power. For games that don't offer physx, you could potentially still use the graphics card for simply rendering the scene, instead of having it sit idle.
Hurray for teh logd!