Yes, this have been mentioned from time to time. There is Director, Actor, Artist and similar categories of data/bios' and images on many sites. Taking advantage of all of this would be just brilliant.
Example: Selecting one actor in Theater View would bring you to it's bios page. And from here you could browse more movies by this actor. You could have own views for this sort of things, and you could browse by Directors, Actors, Composers and learn more about them, or choose to list their work.
This sort of things would be wonderful for the music experience. To be able to read more about the artists, read reviews of albums you're listening to etc.