Seeing future movies from the past is always fun because it is interesting to see what the directors and designers thought the future would be like. In this case, apparently the future involved lots of colored rayon fabric, mall-like structures (apparently escalator technology is also a going thing in the 23rd Century), small cars that run in tubes, and the inevitable "pleasure shop" (because, as always, in the future sex is a thing that we have to have available all the time - sort of like now, actually). Both main characters, Michael York and Jessica Agutter, have continued to act throughout the years but the only person that "broke" out into true stardom was a minor character actor, Farah Fawcett (Peter Ustinov is also in the movie but he came with his own stardom).
The story - based on the book Logan's Run - is a post war society in which all people are given "life clocks" and die at age 30 (age 21 in the book). The main character, Logan 5, is a "Sandman", a lawman who chases down "Runners" (those who do not agree to self-terminate). The movie is Logan's "run" along with a member of a loosely defined "Resistance", Jessica 5.
I will not spoil the plot for you beyond that - it is not amazing, but is enjoyable - but I was more struck by the idea of watching something 40 plus years after it was made.
Remember the year - 1976 - one year before the Star Wars debut that changed how and what we expected from Science Fiction. The costumes and models and weapons and sets and computer scenes - everything - are more reminiscent of the 1960's Science Fiction than what came out the following year. In that way, Logan's Run was fortunate - had they come out the next year, the movie would have been lost to time rather than have something of a small residual following of sympathetic oldsters with nostalgia on their minds.
In a way it is a great and visual reminder of how sometimes a single moment or thing - the Apple IIe, the iPhone, the InterWeb, a kiss - can completely change everything that comes after it. Expectations are not just changed: they are expanded, blown out, never to return to their former confines.
Which, of course, is I will continue to watch such things as Logan's Run: a reminder of simpler and happier times, never to return.