3D TV's evolution has barely begun: CES Daily Spotlight: Future of 3D

An estimated 3 million people already have 3D-enabled TVs. Most use the "active" 3D system, which incorporates the 3D tech into the glasses. Active 3D TVs are easy to manufacture and command very little premium. Active-glasses 3D gives the viewer a full-1080p image in each eye. So they looked like a natural way to introduce 3D TV to consumers. But active glasses are pricey, need to be charged and can be heavy. Active 3D is also hard to show at retail, because they use infrared emitters that interfere with each other, making it difficult to show sets side by side. Plus there's the risk of those pricey glasses walking away. But active glasses are so 2011.

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