Just a couple of weeks ago, Sony introduced the Xperia XZ Premium - the first phone ever to pack a 4K HDR screen. But we've seen 4K screens before (the Z5 Premium), what makes 4K HDR so special? Sony turned to its Bravia team to answer that burning question. The key advantage is that HDR screens can render a wider range of light and color. This means higher contrast, but also smoother color gradients. The end result is much more immersive than the previous standard, which hadn't moved much past the SD TV days in terms of contrast and color. You may think that availability of 4K HDR...
Source: http://www.gsmarena.com/the_4k_hdr_screen_of_the_xperia_xz_premium_explained_by_the_bravia_team-news-23849.php
