After the transition from analogic to digital era all kind of intellectual work like music, movies, books are now digitalized so they lack of a physical support and are just streams of bits that can be copied with no cost.
Most of the companies keep trying to enforce copyright by tecnical o legal means but its failure is proven by the amount of pirated material that everybody of us are consuming every day. I think that industry has to take act of this change and adapt to the real world earning revenue for its intellectual work with a different paradigm.