There is a feature of Windows called “Windows Subsystem for Linux (WSL)” already that basically does the inverse of this (windows host, Linux VM).
https://github.com/microsoft/WSL
The feature is a windows subsystem (for running Linux).
/SUBSYSTEM linker switch was used to specify the target subsystem at compile time, enabling applications to be compiled for different environments such as console applications, EFI boot environments, or native system processes.
In this nomenclature, WSL follows the original naming conventions (although SUA should have been called WSUA).
And also, it doesn't really follow that nomenclature. Those all follow "user code target" Subsystem. Windows Subsystem, OS/2 Subsystem, Posix Subsystem, etc.