Even a Hackintosh typically can only use devices that have drivers in OSX already. If there's no high-end GPU driver, no high-end GPUs will be of any real use on a Hackintosh (unless they're meant only for Windows also running on the same box with a 2nd OSX only card, but that still defeats the point of having a Hackintosh, IMO).
This is why I keep reiterating that if Steve Jobs has no interest in REAL computers anymore and just wants to play with gadgets and other mobile computing devices, he should hand the "Mac" division over to someone else to run. Frankly, I'd like to see Woz in there. He's into "computers" WAY more than Steve, who has always been the "business" guy. Let Woz head the creative teams and Steve can keep selling crap as usual and playing with phones and other gadgets.
The problem is Steve has a control problem and it would be very hard for him to let go of control of the Mac even if he has no real interest in it anymore. It's a psychological problem. And it's one that is hurting those of us that want to see top-notch Mac products and advancements in OSX that keep Windows at bay for many years to come.
Apple had a golden opportunity with Vista to make sure OSX was a full generation ahead of Windows for a long time, but they blew it and Windows7 has pretty much evened the playing field again. Yes, OSX still does some things better, but in other areas Windows is just kicking its butt. For instance, its graphics handling is light-years behind Windows at this point (they haven't even adopted OpenGL 3.x fully, let alone 4.x) and no one with a Windows based machine has to wait around for Steve to approve a new hardware spec like Blu-Ray drives, SLI graphics cards or USB 3.0. I realize these things don't mean anything to many Mac users (since a good part of the Mac demographic has always been the computer illiterate that just like the "easy to use" interface), but some of us actually like cutting edge stuff. I didn't like the Mac OS at all until it moved to Unix (i.e. OSX), but now the most amazing thing ever (i.e. taming the power of Unix with a fully functional GUI) is being wasted in large part due to simple non-interest on the part of Apple's CEO. Yes, they're making money. They're a successful "business" but that doesn't mean they're a great computer company anymore. The "computer" has literally left Apple and that's a shame.