A Hacker News comment:
"I run Windows on my MBA for when I'm travelling. Apple make fantastic hardware; but their saccharine UIs make me retch.
One constant, though: over the past 10 years, I've moved my life further and further into the Cygwin command line, so that I'm insulated from the frippery going on at the edges; with my setup, I'm approximately as at home on Linux, Solaris, Mac and Windows. I'm not optimistic based on what I've seen of Windows 8's direction."
Hey, look. I do a lot of Windows development work on my Mac in a Windows VM too. And some of the recent OSX UI stuff is regrettable.
But running a VM in OSX (a real BSD Unix) so that you can run Cygwin (a sorta-Unix sorta-emulation layer) in a virtual machine?
Doing it wrong.