Microsoft: Windows Subsystem for Linux BUILD 2020 Summary
WSL was a strange beast in its first incarnation (the userspace bits from various distros interacting with a Linux translation layer in the NT kernel) and becomes stranger still in WSL2 where it becomes a Microsoft-blended Linux kernel shipped with Windows and maintained with Windows Update, atop which the userspace bits are run essentially in a container-like fashion.
Graphical applications are coming too, using a layer where RDP talks to Wayland (luckily, rather than X). And interestingly, DirectX 12 and lots of GPU-related machinery is being ported to run on Linux as part of this effort; largely to enable WSL features, but going further wouldn't be the strangest technical consequence of this project.
I still wouldn't want to rely on any Linux testing of neither command line nor desktop applications in this way, but there's an odd symmetry of incendiary grump that the same solution might provide both a decently modern command line on Windows and a decent desktop experience for Linux applications.