I'm all about having anything available on DVD that was once good enough to be screened in movie theatres across the world, because it's the first format that is actually suited for archival purposes. We have such a rich culture and it would be a pity to lose all those 'first steps on the moon' for each era of film.

StarWars is such a nice example, because the original theatrical cuts are - as George Lucas stated himself for years - indeed timeless. Every time I watch them, I'm so totally awed by what they managed to pull off back then - most the SFX in ANH look so 'not 70s', imho. It's such a pity George Lucas is so ashamed of it.