If you elect to see the movie, see it on DVD. The scope of the original motion picture is preserved in this format, as well as some of the original aspects of the film. For example, the film was originally presented in theatres with a classical music overture before the film begins, and an Intermission, again accompanied by classical music. Seeing the movie in the letterboxed format approximates the Cinerama affect from its original run in theatres in the late 1960's. The DVD also contains an illuminating speech given before the film's premiere by science fiction luminary and co-author of the 2001 screenplay, Arthur C. Clarke.
I am proud to say that I saw 2001: A Space Odyssey in its original run in theatres in 1968. I was only 11 years old. I have seen the movie numerous times since, as well as most all of Stanley Kubrick's films.
Here are some links to more web-based information about this amazing film by director Stanley Kubrick:
2001: A Space Odyssey on Yahoo! Movies
2001 and Beyond the Infinite: An examination of the film and its implications
Underman's 2001: Exploring the film
2001 Screenplay by Stanley Kubrick and Arthur C. Clarke - Be sure to check out the original 2001 screenplay from 1965. It's wildly different from the resulting film!