The idea that ARM solves power issues seems a bit overblown and driven by Apple purchasing the most advanced nodes sooner than competitors, causing people to associate the efficiency gain with the architecture even though a lot of it is the silicon process.
Edit: Also Apple can and does do away with legacy support which is less about the architecture and more about expectations of what is included vs. deprecated. The push to ARM seems like it will result in a loss of support and control in the users' hands (converting expectations of PCs into those of smartphones) but now I'm really into speculative territory...
Edit: Also Apple can and does do away with legacy support which is less about the architecture and more about expectations of what is included vs. deprecated. The push to ARM seems like it will result in a loss of support and control in the users' hands (converting expectations of PCs into those of smartphones) but now I'm really into speculative territory...