Unfortunately the world doesn't know how to really appreciate people as much when they're alive for some personality types.
I don't know for sure what the movie business will look like in 10 years, but one possibility is that everyone is able to create their own movies just by describing them, and a small number will say some variant of, "Give me a biopic of this Richard Stallman guy. Base it on his wikipedia entry and whatever else you know about him. Make it factual but an action neo-noir; you know what I like. Probably starring an amalgam of Bogart and Mitchum, the rest you can just make up."
I hope it's far in the future, but we'll see how the media spins it when Stallman dies. They can easily sell him up as some Godfather of computers. Or it can just be a small whimper in the corner of HN. I'd still bet on something closer to the former, but it's not a sure bet.
I'd bet less than 10% of professional developers could say who he is, and that a tiny portion of the population has any clue.
There are probably thousands of similarly important/influential people in various subfields that we have never heard of, because they're not our Subfield, and I highly doubt any of those would get a biopic.