Tim, I love the way you wrote the article. Yes, the content is good too, but it's hard to do tasty stuff out of this subject.
The problem with that definition is that it mixes things. "Literature" is a technical definition of a work (text), just like "photography", "illustration", "audio" and "film". That's how you classify works in such a law: by media.
But "arts" and "science" is another completely different thing: it's subject or intent, just like "entertainment" and "journalism". By that definition, sports films and advertising illustrations don't have author rights.