Duncan Jones' acclaimed Moon arrived on DVD and Blu-ray today, so if you haven't seen it yet, make it a priority. It's a confident debut film from Jones, and it stands shoulder-to-shoulder with the best sci-fi movies of the past year, with a bravura performance by Sam Rockwell and an interesting, unpredictable story.
It also shares a thematic link with two of its higher-profile peers from 2009 -- James Cameron's Avatar and Neill Blomkamp's District 9. Science-fiction often reflects larger issues at hand in our world, and I've been trying to sort out exactly what it means to see three films in 2009 that all deal with a de-humanizing loss of personal identity.
(If you're averse to spoilers, you might want to stop reading and come back after you've seen all three films.)