i don't really know much about arm chips. I almost only ever use mac at work, so i'm totally a windowsky. But efficiency seems to be a huge reason, efficiency and power. So you can imagine, like apple putting their own chip in the mac buker. Suddenly that's a really impressively powerful labatot. And when you have more thermal enveloping, you have like a better form factor. Now you imagine giving it mac book protype space an even bigger chip. You toss like, sixteen gigs of ram and a gigantic apple designed chip in a maci prow, that thing is going to scream....