http://www.engadget.com/2016/01/05/mgm-universal-dolby-vision/
Over the past year, Dolby's worked hard to convince many of the major movie studios and streaming services that its HDR imaging technology is the one worth backing. Netflix, Warner Bros. and Sony Pictures are already on board, but today they've been joined by MGM Studios and Universal Pictures, after the studios confirmed they'll deliver "new release and catalog titles" that have been mastered in Dolby Vision.
High dynamic range (HDR), if you're not already aware, transforms the way you see HD and 4K media. The technology doesn't change the number of pixels your TV works with, it just makes them do more. Dolby Vision, for example, delivers increased brightness, better light-to-dark contrast and colors that the company says have been seen before on a TV.