The film vs. digital conversation that takes place in the moving image world is a contentious debate, with both sides sometimes butting heads in very unfriendly ways.
Quentin Tarantino once said, "If I can't shoot on film I'll stop making movies." That is a bold statement coming from one of the most lauded contemporary filmmakers around.
This article by VOX does a wonderful job of tearing down the argument from both sides, and explaining exactly what the big deal is.
Once upon a time, all movies were shot using machines that would take 24 photographs or "frames" every second and instantaneously leave a negative of those images on a filmstrip. It would then be treated with chemicals and displayed for showings by running the reels containing these strips of pictures through a projector...