I think that Metal or something is actually a built in graphics/matrix accelerator that those Macs have now. It's not really using a CPU although it seems like Apple may be trying to market it a little bit as though it's just a powerful CPU. But more like accelerator integrated with CPU.

But whatever it is, it's great, and I hope that Intel and AMD will catch up.

AMD has had the APUs for awhile but I think they aren't at the same level at all as the new Mac acceleration.