DVD Savant reviews Metropolis. This is not a review of a new Metropolis DVD, alas, but rather of a screening of a new digital restoration. Mr. Erickson might have more difficulty claiming this "THE screening of 2001" if he had seen Apocalypse Now: Redux or the new 2001: A Space Odyssey (which got astonishingly little play in theaters). The good news is that all three of these landmark restorations are likely to make it to brand new feature-packed DVDs, or so I would hope.
Metropolis has been a very difficult film to reconstruct and restore, thanks to a very rocky history scattering many versions across the globe, where they were poorly cared for. I imagine this is also partly why a good version of the film is so terribly difficult to find on DVD (though I've seen screenings of great prints, so why aren't they on DVD?). This article mentions that even more additional material has been found, which will probably make it into future restoration efforts.
See also my July 18th entry on Metropolis, which has all kinds of juicy links about Metropolis on DVD.