I had a few friends who went to the original showing of a movie and I almost went myself but at the last minute did not. The movie is about World War I but it's how they did the movie that what was amazing. I can't remember the title.
Many of us have saw the old movie clips from WWI and before. They walk real fast and have no audio. The makers of the film slowed down their fast pace and put it in real time. And then they hired deaf people to read the lips of what was being said. Now for the first time we now can hear what they are saying.
Perhaps someday people may use this same tactic for the 1913 Gettysburg reunion as an example. The technology is now available.