As noted many Chinese insiders Galaxy S8 get 4K display, the Snapdragon 830, and dual camera.

The first and possibly truthful information was leaked, about the Galaxy S8 smartphone not yet released. And according to rumors, he will get a 4K-display with a resolution (3840 x 2160 pixels), a dual camera, and an unannounced processor named Snapdragon 830. As for the 4K display, he is rumored not only to get a clear picture, but also a complete lack of grain, even when using a virtual reality helmet!
In occasion of the dual camera, Samsung Electro-Mechanics (Semco) will take over it and according to rumors it will be no worse than LG G5.

По сведенью многих китайских инсайдеров Galaxy S8 получит 4K дисплей, Snapdragon 830, и двойную камеру.