Re: Ah well, back to my PowerPoint slides
>The color-fest at the end?
That's not quite the end. That's the "intergalactic switching-station", assuming that I'm remembering the chapter title from the book correctly. <spoilers>From there, we have Bowman arriving at the habitat the monolith aliens had provided for him. He meets his aged self, not understanding that the aliens are four (more?) dimensional, settles into a routine eating the weird blue cheese stuff in familiar containers and watching years-old television broadcasts, finally he reaches the end of his life and becomes/is reborn as the Star Child. As the Star Child, he returns to Terra, visits his mother, and prevents the various blocs from setting off their orbital nuke - rather, he (if he can be said to have a gender, still) prevents them from having any actual effect.</spoilers>
I saw it as a wee lad, during a re-release, on the biggest screen in a large city. Probably in late '71 or '72, as we also saw The Andromeda Strain and THX 1138 projected in the classroom from 16mm prints.