I prefer things vice versa. I know it's very hipster to hate Windows, but if I stick OS X and Linux into VirtualBox, I can then use Samba on Linux and OS X already supports SMB. Now everybody can talk to each other.
I'm going to raise the level of meta-discussion here and say that it's even more hipster (my subjective assesment) to use that subjective assesment (hipster) of other subjective assesments (hate Windows).
But maybe you have found a way and you can then prove me wrong: Does iWorks work in your virtual box VM? Does XCode including iOS simulator work well? Is the performance acceptable? How about the iLive suit? How about unity development? How about the clipboard - does it keep its 'PDF snippet' functionality (no rasterization of fonts, original quality images)?
See, there's tons of OSX exclusive software that's quite demanding in terms of media and hardware acceleration, simply because of the OS's highly integrated character. Unless someone can show me a solid OSX-in-a-box I doubt that it's a good experience.
Yes.
> Is the performance acceptable?
It is for the above. Not so much for anything demanding.
You're kinda missing my point. If I wanted to work in OS X, I certainly would never virtualize it. If I occasionally need to check a website or see how it would look like on an iPhone, then virtualization is a good option.
One can do GPU passthrough with Xen[1] if hardware allows, but that's a lot of footwork to set up and configure. Performance near native through from reports of those I know that have done it. Ubisoft gave a demonstration a while ago of Crysis running through Xen and GPU passthrough[2].