That is not what this article says at all. Quite the opposite.
To do so would probably require Apple to release some drivers (or hardware specs to Microsoft). It's not a matter of just "porting to ARM64" (which is already done), it's about porting to Apple's Apple Silicon platform.
To be perfectly clear, the virtualization is for ARM, so you're getting native level performance with ARM apps and the Windows emulation of x86 instructions flies along pretty well too.