Whether or not they think that or they can, they have been developing GPUs for iOS devices. It'll be interesting to see what they do for their desktops.
I agree. I know they're currently using AMD GPUs, but how much longer will they keep using AMD if they believe that their own in house chips can do a better job? Also, I'm curious as to whether they would try to sell their GPUs (iGPU?) to gamers who traditionally don't stay within the Mac ecosystem at all. Having a 3rd major player in the GPU space would be wild.