It's a bizzare, yet very beautiful and amazing movie. Albeit there are times when it is a tad boring, but then again, I only notice that if it's late at night. Otherwise, it is visually captivating, as is the music.
It's complex, and I know I'm not the only one with this view, but aside from being a statement, the movie (as well as the books) revolves around the monoliths and shows the development of man.
The first instance the monolith appears is with the Dawn of Man, which creates a more sophisticated man - essentially akin to Homo Habilis (using tools and the like)? eh. The second instance is with TMA 1 (or whatever number it was) on the moon - so now man is more advanced; seeking answers and traveling. The third instance is with Big Brother out by Jupiter. Now man can travel through time (or whatever fuckin happened). The fourth and final instance is creating life. Now I'm not sure what happened there at the end with star child and all that, but its clear Bowman was aging, then reborn. Its crazy, but damn it sticks.
Of course there is also the link with technology and life. We rely on it, and utilize it, to the point where it, too, becomes life almost. We also have the power to destroy it, much like those apes did (a bit of a stretch but I don't know).
definitely one of the best movies out there.