LG's 84-inch ultra-def 4K 3D TV

4K TVs--also known as "ultra-definition TVs"--offer twice the resolution of current 1080p HDTVs. Sounds cool in theory, but there's not any video content available (outside of the PC and photo realms) that can take advantage of all those extra pixels. Still, LG's jumbo-screen ultra-def TV may show promise by allowing full 1080p HD with passive 3D glasses--something not possible with current passive 3D models. We'll see later this week.

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LG's eye-poppin' 84-inch 3D ultra-def TV heading to CES