This statement as-is will confuse a lot of people, since we already had threads from people yesterday who were panicking because they thought Bootcamp was going away on existing Intel Macs. Nothing is preventing Parallels from continuing to offer Windows support via emulation like Virtual PC did 20 years ago. I suspect they'll probably end up doing that and mentioned this
in another thread earlier today.
Additionally, Microsoft offers Windows on ARM containers for Windows ARM hosts (but not direct distribution of the OS as a whole) and perhaps someone could unofficially get one of those images running.
I think it's safe to say there will be ways to run Windows, but it's too early to tell how good or bad those will be.