Someone posted a few months ago a story where they were using something similar to this (couldn't find the actual comment, sorry) where they had a HD with a very bare linux install on it that had enough drivers on it to boot on most any modern machine, load up qemu and boot a OSX image.

It was basically a "portable" hackintosh that could be moved between most any desktop machine.

I thought it was a cool idea, and tried to get it working with this repo, but didn't have much luck even with a full load distro (Ubuntu) on a Dell i5 with a nVidia GPU I had sitting around.