I agree that 500 lines of resolution could not POSSIBLY duplicate a release print, even if the prints were very hasty and wound up coming out blurry.
Obviously the optical copying process gives the 35mm a kind of "fuzzy" look, but I've got to think there is way, way more resolution and picture information there, even though it is not going to be razor sharp like the negative.
From what you read, too, a Star Wars print in 70mm is an amazing experience.
In any case, the quality and dynamic range of the audio would have been awesome and also the dynamic range of the colors would have been far greater than any commercial DVD.