LG let us know at CES 2011 that it had 4K LCD televisions in the pipeline, but unfortunately they didn't make it out this year. Expect for that to change in 2012, as the company just announced it's bringing an 84-inch "ultra definition" (3840x2160) TV to Las Vegas to go along with its 55-inch OLED. It has all of LG's Cinema 3D and Smart TV features built-in, including support for that upgraded Magic Motion remote and voice control. There's no official word yet on when we'll see these on shelves or at what price, but it certainly looks production ready compared to other prototypes that have been displayed over the years. While we don't have easy sources of 4K-res video content yet, one of the reasons LG is making the jump first is for 3D. Its Cinema 3D tech uses a Film Pattern Retarder (FPR) screen and passive glasses that result in lowered resolution, but with those extra pixels there's no question about whether viewers are still getting at least an HD picture. So far 4K at home is the domain of Sony and JVC's high-priced projectors, but we'll see if any other companies (we'll check off Toshiba right now) show off upgrades in size and resolution of their HDTVs this year. Check the press release after the break for a few more details.