Sony XBR-55X850B 4K Ultra HD TV: This TV ushers in the future of high-definition with 4K — 4x the resolution of Full HD. Catch every stunning detail of the big game, and enjoy your favorite movies and shows with outstanding clarity. Plus, take advantage of Smart TV features like Web browsing, streaming video and social network integration.
This is an amazing TV with exceptional picture, very natural color and acceptable sound. 4k picture quality is a big improvement as compared to the 1080p TV. I purchased this for a month now and have no problem so far. Highly recommend this Sony 4k TV. Great price performance.