Sony claims the Xperia XZ Premium is the world’s first smartphone with a 4K HDR display. 4K on a 5.5-inch display is technically impressive, but there might be a large negative impact on battery life. HDR? True HDR requires a display with an LED-backlit BLU (the more LEDs the better), or that it be an OLED display. Does the Xperia XZ Premium have an LED-backlit display? Most likely not; the BLU like almost all other non-OLED smartphones is edge-lit. Is it OLED? No. I might be wrong, but the HDR in this case is probably software based.
The overall industrial design of the Xperia XZ Premium is to my liking: a simple but consistent rectangular shape with diamond cut chamfered edges. The only area that needs a bit of improvement is the forehead and the lip; they are too thick. On the other hand I don’t like it too thin because in order to hold it firmly our fingers need some space. I would have forgiven the thick lip if physical or capacitive back, home, and apps buttons were located there, but no they are on the display taking up valuable pixel space. Oh, there is one more niggle: although the camera bump is not as large as the ones found on recent iPhones it’s still there. A camera-bump-less design is a more beautiful design.