are any engines out there currently using intel's built in GPU on the their CPUs as a physics co-processor when a PCIe GPU is already doing rendering?
I was playing around with beignet today, and it made me think that an inactive integrated GPU would make a really decent physics co-processor and would be able to increase the amount of phys objects in a game. If no one is doing this, it would be a really neat thing to implement in an engine.