In the last ten years, television has reinvented itself in numerous ways. The demise of the U.S. three-network system, the rise of multi-channel cable and global satellite delivery, changes in regulation policies and ownership rules, technological innovations in screen design, and the development of digital systems like TiVo have combined to transform the practice we call watching tv. If tv refers to the technologies, program forms, government policies, and practices of looking associated with the medium in its classic public service and three-network age, it appears that we are now entering...