Honestly, I think Intel and AMD are busily building a faster horse (to borrow from the urban myth Henry Ford saying.). Look at the Linus Tech Tips video (where he's dismissive precisely because he's coming at it from the established approach perspective.). "So you can't upgrade your memory. waaaaah waaaaah".
In my opinion, I think most people who buy Macs never think about things like upgrading the memory, and they don't actually care what chip is in it. They care what the machine can do. So giving up the ability to upgrade your memory, by putting the memory IN THE CHIP, instead of inventing faster and faster pipelines from the CPU to the memory... It's the sort of stuff Intel and AMD aren't even thinking about because they are stuck in the established approach of "CPU, GPU, Memory, Motherboard, IO controller, etc etc etc." They make chips. Someone else has to turn them into a working physical system and someone else has to supply an Operating System that can make use of the features...
Vertical integration is incredibly powerful and I'm very hopeful for what Apple is going to do next.
I'm just waiting cautiously to see what happens with virtualisation as I use my Mac for development and I need to be able to use Postgres, Node, etc etc.