I am glad you asked Ron. My experience with 3d on my DLP have been very promising and continually wows any and everyone who comes over to see it. I use the Xbox 360 and Avatar video game along with 2d>3d conversion of DVDs with my laptop using the Tri Def software that was bundled with my glasses. I use the Samsung SSG-1000 active shutter glasses and they may not even be the best to use. I will have more of a comparison when I get the Xpand X102s. Can't wait.
Now as far as loss in resolution, I really don't notice the difference. I mean the image was a little soft due to the fact that I use a a calibrated mode that may be geared towards movie watching than playing video games. So the softness is quickly remedied by increasing the sharpness from 20 to 60. Poof, the image is crisp and sharp as it would be without the 3d mode enabled.
Now I experimented with the in game 3d controls a bit which and by pumping up the gamma, contrast, and 3d effect, you can add more dynamic pop to the image. Also you can set the limits by inputing your screen size and distance you are sitting from the display. I took it another step further and switched to entertainment mode on my display and set it to game. That setting there is more akin to what I have seen at the demo in Best Buy.
Ron really the only drop in quality that I have seen is in image brightness. That is the nature of 3d with active shutter glasses. I feel that it is a necessary evil as it is easier on the eyes and allows for prolonged viewing. But if it is not bright enough rest assured it can be made brighter if one is inclined by toggling the settings.
Ok onto my viewings of 2d>3d conversion of DVDs. This is not as much of revelation as it was with the Avatar video game. The conversion can be quite spectacular with certain material. If I really want to wow my guests to whom I am demoing the setup to, I pop in Star Wars Episode 3 and cue to the final lightsaber duel. The effect works real well, where the blades come off the screen and whiz by your face. Absolutely amazing. Of course this was achieved not easily at first. I had to manually make adjustments to the software control panel to find a nice middle ground so the rest of the movie is watchable and not grossly exaggerated. I also think that this sets a good watermark to really showcase that 3d will not work for everything. Pop in a movie like Steel Magnolias for the wifey and 3d does a whole lot of nothing for the experience.
I have also experimented with Google Earth in 3d as well. This can be an amazing experience at times when the Google software is functioning properly and an absolute disaster when not. Your mileage may vary with this one.
So in total Ron I am quite happy with the 3d feature on my inferior DLP. I think the resolution is fine and I look forward to getting some more content for further testing and enjoyment. After seeing the demo at Best Buy, I realize I am very lucky to have this feature. Couple that with the 67" screen size I am actually ahead. While I may not get 1080p per eye, having seen both techs I am hard pressed to see the difference. I mean most people on here will say that you can't even reap the benefits of 1080p on a tv like you could with a projector, so I would imagine the same applys to 3d.
Hope this was insightful.
Now I will wait to get blasted by tech and spec folks about how wrong I am.