LG Ships 55" and 65" 4K HDTVs For $6000 And Up
Each one also includes a 4.1-channel, 50-watt sound system via a sliding speaker bar. With LG's NANO technology, LED particles are dispersed across a thin film behind the screen enabling detailed local dimming that provides superior picture control by allowing discrete sections of the LED array to be individually controlled, based on the picture. Even before so-called "4K" content is widely available, LG's powerful Tru-Ultra HD engine upscales things to fit nicely on the native 3840 x 2160 resolution.
Not cheap, but are you planning on being an early 4K adopter?