As if LED and 3D TV weren't confusing enough, in the last few months we have seen a new HDTV technology called 4K, or its official name, Ultra HD. It's being heralded as the next high-def, and judging by the show floor at CES 2013, manufacturers are lining up to bring you a new array of products.
But just as was the case with 3D, it's the hardware chicken before the software egg: there's no consumer 4K content available. Still, if you listen to the industry, it'll tell you it's the last resolution you'll ever need. So what is 4K anyway, and what makes it different from high definition?Editors' note: This was post was originally published January 23, 2012, and has been updated several times thereafter with expanded information, most recently on January 17, 2013.… Read more