I wouldn't call "running an app in a linux VM on windows", "running linux". As a user, your main interface with your computer is windows, which is what "i'm run

I wouldn't call "running an app in a linux VM on windows", "running linux". As a user, your main interface with your computer is windows, which is what "i'm running windows" means, and obviously "you can use the same kernel features as Docker to sandbox applications yourself" wouldn't work, e.g. you couldn't sandbox photoshop like that.