Microsoft seems to aim for deep integration of Linux in Windows per WSL. They even showcased that they are working on Wayland support for WSL, which would enable using Linux GUI applications directly on Windows.
We may soon get at a point where Linux applications feel as native on Windows as native Windows applications (which use quite a variety of toolkits anyway), as the integration deepens.
Now WSL still uses larger distribution images. But very little holds them from supporting thin Linux images with just the necessary dependencies that launches in Windows as any other application.
Using LLVM for ABI compat is a good tip though!