I saw a print of Raiders three years ago at an art theatre. It was old and faded, but the essential look of the film came through clearly. For the most part, the dvd version replicates the proper appearance pretty closely, though like Zombie84 said, it does emphasise the red side of things more. Most of the time it's not an issue, but the bar fight scene in Nepal seems to have a large amount of red added to the lighting that was not on the film print. I recently saw the THX 'Wow' demo and the shots from the bar scene look the way I remember them from the print, so there was definitely a change to the colour scheme of that scene for the dvd.

I am seriously jealous of Steve Hoffman for being able to see a 70mm Star Wars print just a couple years ago. I wonder who owns it and how they've been able to hold on to it all this time.