I run windows, but always run a Linux VM in which I do all of my dev work, and have an OS X laptop which would be a linux laptop, but Logic/Final Cut Pro keep it that way.
Any particular reason you have a Windows host + linux VM instead of the other way around ? Personal experience has been Linux hosts + Windows VM performs better than the other way around.
Windows handles media much better than linux. I have a linux media server as well, and while I like it for somethings, getting Blu-Ray/DVD/MP3/CD/Netflix/etc. working in it is not one of those things. Windows just works in that sense. Also games, although this is more of a theoretical bonus as I rarely play anything.
I virtualize Linux under Windows too. My primary reason is gaming. I can use Linux without any hardware acceleration. My dev environment is entirely virtual and there are advantages to being able to throw it on a thumb drive and carry it around. Or I can be staying with a friend for a week and setup my ideal working environment on their computer in a few commands. Another advantage is it's much smaller than a Windows VM so I can store more Linux VM's/snapshots on my puny SSD.
The two apps keeping me from running Linux full time are Ableton Live and Adobe Fireworks. Unfortunately it doesn't seem likely that the high-end proprietary content creation tools or anything comparable from the OSS world are likely to come to Linux any time soon.
Never used Ableton, but I've been dabbling in Reaper[0]. I can't make a full switch yet, but am hoping to be able to at some point in time. From the little I've seen it isn't missing anything major.
Final Cut Pro is another story, but I really don't use it very often anymore, and I'm well-versed enough in Adobe Premier that I could probably drop it.
I'm not holding my breath either, but I do dream of a world where most software is OS-independent. I guess we're closer now than we have been for a while.
EDIT: I just remembered that Reaper is Win/Mac. I hear it runs under Wine, but I'd be worried about latency there. Alas, we are captive to our tools.
Right tool for the right job, IMO.