ARM: maybe. Intel would be smart to make an ARM CPU. M1: probably not. Apple never really knew how to sell servers, and having a premium brand means they can't sell low-end laptops, so the market for something between a Chromebook, iPad mini, and low-end Macbook Air will still be x86 (maybe Intel, maybe AMD, whichever's cheapest) until ARM Windows is a thing.

ARM in the datacenter should be Intel's main fear.