Every single one of the new "3d" monitors/glasses seems to be a step in the wrong direction. It's basically rehashing old technology so people can spend money on them. I've tried out a 3d monitor (which is very difficult since I wear glasses, and I can't really see much without them) and it hurt my head after 30 seconds of viewing it. No thanks.
Now, on the other hand, I'd much prefer to see the technology behind head-mounted displays advance further. They've always seemed like an awesome idea to me, but the technology just isn't advanced enough for gaming quite so soon. Maybe if a few larger companies were to invest in it, we might have a new, fun toy in a few years.

Please do not right off the technology If you had a bad experience with cheap shutter glasses or lensless HMD (head mounted display) from 10-15 years ago. They cut too many corners on that stuff trying to bring the price down for mass market consumption. The tech isn't terribly advanced (stereoscopes are over 100 years old), but it does need special software support for best results. Kinda like touch screens.
I'm also a big fan of HMD. I think some of the higher end models have adjustable optics so you don't have to wear glasses or contacts. Well out of my price range though. :(

I'm writing it off not just because of a bad experience, but because I think it's a step in the wrong direction. The problem with ANY kind of 3d glasses is it doesn't actually make you feel immersed in something. Sure, you've got depth, but you still are looking at a monitor or tv screen. You still don't feel like you are actually in the game.
With the proper HMD, you would be immersed much more than just a simple 3d glasses trick, and get the feeling of actually being in the game, due to you not being aware of your surroundings at all times because of the screen taking up your entire vision. Unfortunately, this technology is at least 10 years away from being widespread.
Also, as for the whole red/blue glasses, give me a break, nothing ever looks right in those.

Wraith, I have to disagree with your last post. I have had the occasion to try the nVidia glasses with the 120HZ monitor and my reaction was : "when will I have enough money to buy this thing ??" I have a problem with my eyes, the left being very very weak, so the 3D movies are generally not so impressive to me because i think i miss a great part of the 3D effects.
But with these glasses, with the demo on Resident Evil and Burnout Paradise, I truly entered a new world. I could actually see 3D, I had this impression of distance you only have in reality. And the glasses were no problem to wear for me, even if i wear glasses !
I could not help but phantasize how it would be with Mirror's Edge or Oblivion, for example...
Of course, this system is not perfect, but the fact that it works with regular games is just amazing to me !! So i consider it's a step in the right direction.

It still doesn't change the fact that I can't use it since I NEED glasses to see, even sitting close to a monitor, and the 3d glasses don't fit over my current glasses.
Many other people with glasses have said the same thing, and in a PC gamer (I think it was PC gamer anyways, might have been Game Informer) they mentioned the exact same complaint. It's not for everybody.

Well, I wear glasses ALL THE TIME and when i tried the nVidia glasses (the one which work with the 120 Hz monitor), i was delighted to see that it fitted perfectly over my glasses. I tried over quite a long time and i felt no weariness for having these glasses over my glasses. The 3D effect was not tiring at all, in addition.

3D gaming has existed for years and years. I've got a pair of archaic goggles that plug inbetween a monitor and a PC, and with an app that sits on top of the video driver, makes practically any game 3D.
However, they went out of fashion due to the rise of the TFT - the refresh rates on most of them were solidly locked at 60hz, meaning any 3D image was pretty much 30hz by 30hz, resulting in much eyestrain and nausea. But back in the days of the CRT, I was playing games at ridiculously high refresh in proper 3D and having an absolute whale of a time.
EDIT: Was from this company - http://www.edimensional.com/

Yeah, a CRT + shutterglasses combo can be really nice but I'd use nothing less than 120Hz refresh rate. That requires a pretty high end CRT which most people didn't have at the time.
Unfortunately shutterglass tech doesn't work with most LCDs. I wouldn't be surprised if the CRT --> LCD transition set back the consumer stereo 3D market 10 years. Damn shame. :(

Bearing in mind how long ago this was, even cheap CRTs could do high refresh rates at lower resolutions. This was back when 1024x768 was considered a ridiculously high resolution (and usually the absolute maximum for most games). I had a CRT that hilariously I found in a skip which did nearly 200Hz at 640x480 - it didn't require a high-end CRT at all. Though the chances of finding -any- CRT nowadays is slim to none.
Yeah, this is why it's annoying that a lot of people seem to be claiming this is an entirely new application. It did technically work with LCDs (my glasses still do in fact), but then you're limiting yourself to a 30hz refresh rate, and that would cause even the sturdiest person to feel extremely ill very quickly.