During WWDC, they explicitly said that Apple Silicon will support virtualization and Docker. Rosetta doesn't work for virtualization though, so you have to run an ARM version of Linux. They don't support booting directly to a non-Mac OS, AFAIK.
Rumor has it that they'll eventually support virtualized Windows, but it's currently impossible for an end-user to buy a copy of ARM Windows.
Rumor has it that they'll eventually support virtualized Windows, but it's currently impossible for an end-user to buy a copy of ARM Windows.