Most likely they go away
bootcamp is simply a method to allow you to install windows on your mac. Technically you don't need bootcamp to run windows. If Apple rolls out ARM based Macs then the only possibility to run windows is to use the ARM version of windows but that's no guarantee since not every ARM cpu is capable of running windows. In all likihood, and imo, running windows on a Mac will be a thing of the past if Apple goes with its Ax processors instead of intel processors.
Virtualization, is a different matter, that's running a virtual machine and the intel CPUs have hardware baked into the CPUs to allow this, at this point Apple's Ax CPUs don't seem to have this. That means running multiple Vms from macOS is not something that would be possible with an ARM based Mac.
Back when Macs were on the PPC platform, the only way to run windows was to emulate an intel CPU and emulation was incredibly slow - painfully so and given the high demands of today's software, it may be worse. I don't think emulation is a feasible option to running windows if Apple does indeed transition to an ARM based processor.
Good explanation. I guess Apple will lose some customers when they switch the Mac over to ARM.