DVDs: Battle Of Blue Lasers

Lasers may be the weapon of choice for sci-fi movie heroes when the fate of the galaxy hangs in the balance. But back here on Planet Earth, lasers are at the center of a movie battle of another kind: the one among Japan's giant electronics manufacturers over the next generation of DVD technology. The winners will get to set the course of the home-video entertainment industry for perhaps the next decade or longer--and reap billions in licensing royalties in the process.

With the convergence of the TV and the PC finally becoming a reality, the technical specifications of tomorrow's DVDs have...

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