More importantly than bringing the shell over to Windows, developers will now be able to write their .sh Bash scripts on Windows, as well (or use Emacs to edit their code). Microsoft noted that this will work through a new Linux subsystem in Windows 10 that Microsoft worked on with Canonical.
— Microsoft is bringing the Bash shell to Windows 10 | TechCrunch
So this if what all those Microsoft folks at Great Wide Open were so damn giddy about a couple of weeks ago. I must say I’m dumbfounded. Bash will roll out in a Windows 10 update this summer, sooner if you’re part of the Insider program.