LOL, where can I get what you are smoking.
From that quote, I am guessing 'upconverted' you mean a standard DVD, has no discernable difference in image quality compared to BD and HD DVD.
WOW, I would say that you need to check your TV (or projector), and or get a full 1080p TV.
Are you not getting the near 3D look from your HD material?
The difference is night and day, 80% of the time (will depend on the quality of the transfer)
Heck, I see a difference when I watch HDTV compared to a great quality HD DVD or BD.
Example, watch Planet Earth on Discovery Channel HD, then watch the HD DVD or BD version.
If you can not see a difference, then I would say have a ISF calibrator over, to check your setup.