What's wrong in running Ubuntu/Fedora in a VM, if you really interested in trying it out?
Nothing wrong -- except I don't have enough juice on my laptop to run VirtualBox, etc. Want to attract 70% developers, have something to run easily on windows.
If you're feeling adventurous, it's possible to build and deploy apps using Windows.
Most of the major hurdles are fixed and now it's just a matter of some clean up and documentation.