Well i was lucky enough to see Star Wars last year at our local tiny arts theater. They had one showing so i took my eldest to see it. the cinema section only seats about 100 and the screen was pretty small. It was a very battered print and we lost audio for about 15 minutes just after luke goes back to the homestead to discover the death of his aunt & uncle. One thing i can remember is that the canyon was indeed darker than my VHS copies but not as dark as it appears on the 2004 DVD (which is why it remains dark in my edit). It didn't look like it was due to the condition of the print because for the most time the colours looked almost the same.

I contacted them recently to see if they have any plans to screen this again for the 30th anniversary and i was told that they had got into a lot of trouble showing this version and it was recalled immediately after. When our old main cinema was closed down and demolished they found a copy of the print in the vaults which they shouldn't have had. So it looks like lucasfilm really doesn't want the original ever to be shown again. Pity but it was well worth the £2 admission fee.