I got this movie recently when it came out on Ultra HD Blu-ray simply because it was missing in my collection and, being a Sci-Fi fan, missing 2001 in my collection simply would not do. It is a movie that was made to rely almost entirely on the visuals. It could be said that it is a visual symphony if that makes sense. Thus it was filmed on 70 mm film and in 6 channel stereo which, at the time was a huge thing. Thanks to this it actually made some sense to transfer this movie to Ultra HD Blu-ray since the originals were really good enough even though the movie was made in 1968.