The iPhone X display is a whole other level of definition. The last time I looked at iPhone pixels, it was the iPhone 6. There are other images of previous iPhones on that post demonstrating a completely different pixel layout. But this OLED display is phenomenal and so close to the glass surface of the display, it is hard to believe. The individual pixel size on the iPhone X is around 458 pixels/inch with blacker blacks than I’ve ever seen on a display and the colors are incredibly vivid.
This looks to be a Samsung Super AMOLED display with a PenTile diamond matrix configuration with diamond shaped red and blue sub-pixels and oval shaped green sub-pixels in a 2:1 ratio with the red and blue sub-pixels.
You can download a full resolution image here.