Forgot videos and DVDs
When I was a kid, there were only two ways to see a movie: watch it in the theater, or wait for it to show up on TV. That was it. Disney movies would repeat in the theater once every ten years or so. You had to go to SF conventions to see movies you hadn't seen in years.
I really don't think most people appreciate the ability to watch almost any film you can imagine practically on demand. This is really cool.