I think 3D Vision just blows away non-3D gameplay whatsoever. After playing a few games in 3D there is just no turning back to 2D. Of course 3D requires much better computer configuration, but I think 3D with poor graphics is generally so much better than 2D with excellent graphics, and 3D with excellent graphics is just incredible, for those who can afford it.
The games that I've played in 3D and that I'll never play again in 2D: Mass Effect series, Dragon Age Origins, Fallout: New Vegas, Battlefield 2: Bad Company, Battlefield 3, Call of Duty: Modern Warfare 3. All these games looked amazing in 3D, especially Mass Effect and Battlefield 3. Not much details to say, you just have to try it to find out how amazing it is.
So, what do you guys think about 3D Vision? Which games, if any, do you play with it on? Do you find the experience as thrilling as I do, or is it nothing special for you?