This is a good article about the ongoing digital rights issue. It focuses on the 1998 Copyright Term Extension Act(CTEA) that extends copyright protection from 20 years after the author's death to 70 years. I don't see where the CTEA promotes the arts by protecting their economic value and thereby fosters greater incentives to create.
BusinessWeek: A Case to Define the Digital Age. A Supreme Court ruling against the CTEA would be the first major victory for digital-rights activists, who want more books, music, and images to enter the public domain. And it would be a grand defeat for corporations, which claim they would forfeit billions in lost revenues. [Tomalak's Realm]