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I'm not talking about those awful red-and-blue glasses or cheesy 3D movies from decades ago; I mean the current state of the art, including commercial cinema and 3D TVs and Blu-ray players (which can now be bought for as little as $120, less than a pair of active glasses!). Modern 3D is big news, but is it an important technological leap or merely hype to get consumers to spend more money?

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