The Samsung Galaxy S8 and Galaxy S8+ just got unpacked, it's time for introductions. The hotly anticipated flagships build on the S7 edge design largely by taking over the bezels. The two phones mostly differ in screen size - the Galaxy S8 has a 5.8" screen, the Galaxy S8+ is at 6.2". Both are Super AMOLEDs with an extra wide aspect ratio of 18.5:9, they have the same resolution too (1,440 x 2,960px). Also notice the rounded corners of the screen. HDR10 is supported, just like it was on the Note7, but Dolby Vision is not. Samsung partnered with Amazon to bring HDR capable content. This...
Source: http://www.gsmarena.com/samsung_galaxy_s8_and_s8_unveiled_widescreen_powerhouses-news-24264.php