Copyright and Trademark law is almost assuredly going to become one of the most important elements of our lives as we move closer and closer to technologies that will make our game consoles, televisions, and computers a single device, so I wholeheartedly recommend getting a firm grasp on the concept.
From the article:
So while technically the law has allowed rights holders to infinitely discriminate among the offerings they want to make — Special discounts on this book, which may only be read on Wednesdays! This film half-price, if you agree only to show it to people whose names start with D! — practicality has dictated that licenses could only be offered on enforceable terms.
When it comes to retail customers for information goods — readers, listeners, watchers — this whole license abstraction falls flat. No one wants to believe that the book he’s brought home is only partly his, and subject to the terms of a license set out on the flyleaf. You’d be a flaming jackass if you showed up at a con and insisted that your book may not be read aloud, nor photocopied in part and marked up for a writers’ workshop, nor made the subject of a piece of fan-fiction.