You can use Tridef software on Nvidia cards, which would give you the option to use polarized 3D as well as a few others technologies. I've also heard that there is some conversion software that works with 3D vision.
I have been using the Nvidia 3D software thing on standard monitors ever since they came out , remember playing Tomb Raider Underworld in 3D with those RB Glasses. So it works both ways, you either have the software in the GPU or have the Software Code Hard Wired into the Hardware calling it a chip and making a 3D Monitor/TV out of it.
I remember a lot of guys asking us if they needed to buy the 120Hz 3D Monitor to watch movies and play games in 3D, and, the advise was always no need, if you want to get a feel of it this is a better option, because 3D stuff doesn't suite everyone.