TV over Internet protocol - IPTV - will transform couch-cruising into an on-demand experience. For the Internet, it will mean broadband at speeds 10, 100, or even 1,000 times faster than today's DSL or cable. Online games would be startlingly realistic; the idea of channels would seem hopelessly archaic. Why not indeed?
So far, the answer has been inertia. But competition is a powerful stimulus. For years, DirecTV and EchoStar have been adding subscribers far faster than cable, so cable companies want something satellite can't match. At the same time, voice over IP is enabling cable operators to poach phone customers from telcos. Combine VoIP, truly high-speed broadband, and totally on-demand TV - and you've got such a compelling proposition that the Bell companies figure the only way to survive is to do likewise.
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