The parallel between SaaS and live music is pretty interesting. Seeing a play in a theater (as the un-pirate-able version of a movie) also fits in this category. Service instead of product, essentially.

I'm struggling to extend the analogy to books, though. The mental image of a kindergarten teacher reading a book and holding it up for the class to see the illustrations is a bit weak... perhaps theater serves as the post-movie and post-book medium alike.