I often find it's so instructive and interesting to look at entertainment technologies of the past to see how far we've come and also to look for clues in what happened as one type of tech was transformed by another.
Polaroid "instant" cameras were once the rage, until digital. There were black and white movies and silent pictures. There were tintypes, color film, the Brownie camera, and flashbulbs. We had record players with 78rpm and 45rpm records.
Here's one you may not know about but was so fascinating as a form of entertainment: the cyclorama. Take a look at this piece about the Gettysburg cyclorama. It's fascinating stuff. What can we learn from it?