Here's a kinda geeky article about NFL Films. It sounds like one of the reasons they use so much film is for the high-speed (slow-motion) shots. It also sounds like they're starting to use more digital stuff too.
Originally Posted by Mick Fagan
Also, those one-use cameras sold at drug-stores and so on are still pretty popular. There are still a lot of people who have no camera of any kind, and just go get a disposable for birthdays and whatever. Those things probably account for way more film use than we do.