Caitlin McGarry, Gizmodo:
Apple is making a family of custom ARM-based processors for Macs, which is a huge shift that brings with it rippling effects. One change that some might not be too pleased about is that Boot Camp, the free utility that allows you to dual-boot Windows and macOS, is going away on the new Macs powered by Apple silicon.
You can still disable Secure Boot using the same method as on Intel-based Mac. But it’s entirely up to Microsoft to support booting from something other than the 3 supported Qualcomm SoCs Windows on ARM currently supports.
I don’t know what fraction of Macs today are currently using Boot Camp but, I imagine, anyone who is using it really does rely upon it. It sounds like Apple would like to support Windows on ARM but, if anyone was wondering why Linux was demonstrated during the keynote instead of ARM Windows, it sounds like a technical limitation on the Windows side and not with Apple’s own processors.