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CES 2012: 4K technology from Sony

Sony is showing off 4K TV technology at CES, which has four times the resolution of current 1080p sets. But there won't be much 4K content for a while.

Sony is showing off 4K TV technology at CES, which has four times the resolution of current 1080p sets. But there won't be much 4K content for a while.

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