Ubuntu on Windows

"Linux geeks can think of it sort of the inverse of "wine" -- Ubuntu binaries running natively in Windows. Microsoft calls it their "Windows Subsystem for Linux"."

I find it amazing that you can have such a functional Ubuntu environment by translating system calls. Microsoft does have the advantage of Linux being open-source I suppose, while the Wine project had to reverse engineer DLLs. Or have you supply them on your own.

I would rather have the opposite. I would even pay for an official "Windows on Linux". There is a handful of games I would like to play, but other than that I have no interest in windows.

Totally doable. Use KVM to virtualize Windows and (the important part) make sure your CPU and motherboard support VT-d. Then you can pass a graphics card (separate from the one you run Linux with, naturally) to the VM and get >95% of native performance. There's lots of videos of folks doing this.

That's still "VM" not "Native".

You aren't running them "side by side"... you are running them "One inside the other".

Not exactly an apple-to-apple comparison.

The performance hit is so negligible on modern hardware that the distinction doesn't really matter.

Except, it does matter.

Not having a unified filesystem, not having a unified window manager, etc are quite some issues.

As another posted pointed out, if you just want to bring up a VM for gaming, who cares?

Also, you can share directories between the native filesystem and the VM quite easily. And if you're using something like VirtualBox or VMWare there are "unity" windowing modes available.