The thing you need to keep in mind is that nVidia's 3D Vision isn't the same as other 3D technologies.
nVidia's 3D Vision normally requires a 120Hz monitor and their own glasses, because it displays the game at 120Hz, which allows you to effectively play at 60FPS (each eye is interleaved, so for each frame, you must display it twice -- once for each eye). Their own glasses are used because the nVidia software must signal when to switch the opaqueness in the lens (that's how active shutter glasses block out an eye). This is also all performed over a DVI (I'm assuming it's actually DVI-D) connection.
What this software package does is essentially enable the "TV industry 3D standard" on your nVidia-equipped PC. The 3D standard that is used by pretty much the entire TV industry as well as AMD involves a completely different transmission method. For the most part, there are 4 transmission methods that you encounter: checkboard, side-by-side, top-bottom and frame packing. The PS3, Blu-Rays and AMD use the latter transmission method, which unlike the others, provides full content per eye (two 1080p frames).
As another user mentioned, the big drawback to this for PC use is that there are only a few resolutions that are used, and those are typically 720p50, 720p60 and 1080p24. The latter number is the refresh rate (or hertz) for the monitor. As you can probably guess, gaming at 24Hz is probably not terribly ideal, so you'd be restricted to 720p60 (it's more common than 720p50) if you want to game.
As for the glasses, most active-shutter glasses aren't really different at all. There are two different types (IR and DLP Link), but unless you have a DLP TV, the latter doesn't matter much. nVidia's 3D Vision uses IR-based active shutter glasses, which require an infrared signal to tell them when to switch the opaqueness in the lens. In nVidia's 3D vision kit, they use a USB IR emitter or you can simply use a USB pair, which receive the signal directly from the PC.
Essentially, there should be no difference in the actual glasses, but there is a difference in regard to the IR emitters used. 3D Vision will use an IR emitter attached to your PC (I believe some PC monitors have them built-in too), and most TVs have them built-in.
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