w2qw points out the apps don’t run as fast this way, as they would with a native Windows 10 version. This is because they are essentially running on a server app, installed on the Windows 10 machine.
Another redditor, starlig-ht was even able to run Xfce, a Linux desktop environment used by some Linux distros, on Windows 10.
With all this functionality being opened to Windows users, what’s to say the functionality won’t end up being exploited and run in the opposite fashion? Windows 10 machines that boot directly into a Linux desktop environment and native Windows 10 apps then run in the Linux GUI?
If you want to try all this for yourself, you need to do the following:
Enable Developer Mode (Settings > Update & Security > For developers)
Enable the Windows subsystem for Linux (beta) Windows feature
Open a command prompt and run bash