[h0l0cube]

Specifically physics benefits from CPU processing. Efficient rendering pipelines are typically one-way (CPU -> GPU), whereas the results of physics calculations are depended on both by the game logic and rendering, and it's much simpler (and probably more efficient) to keep that computation on the CPU. The exception to this is could be on UMA architectures like the Apple M-series and the PS4, where memory transport isn't a limiting factor – though memory/cache invalidation might be an issue?

[eigenspace]

Even with UMA architectures where you eliminate the memory transport costs, it still costs a ton of time to actually launch a GPU kernel from the CPU.

[h0l0cube]

Yeah, that's why I qualified with 'could'. Really depends on what facilities the hardware and driver provide. If the GPU is on the same die, perhaps the latency isn't great, but I really don't have the data on that. But I'd really like to see something like voxel deformable/destructible environments leveraging UMA on the Apple M. Seems like that something that would be groundbreaking, if only Apple really cared about gaming at all.