I can’t speak to screen sizes. I’m still not sure what the deal was there. There was a reason for OLED. The first Android phones with OLED looked hideous. The

I can’t speak to screen sizes. I’m still not sure what the deal was there. There was a reason for OLED. The first Android phones with OLED looked hideous. The saturation was all wrong and they used pentile subpixel arrangements. Further more I remember seeing pictures of burn-in on some (cheaper/off brand?) OLED phones. Apple has their priorities. And display quality is one of them. Look at professional reviews of their monitors and other displays like the iPhones and iPads. Whatever people think of the cost/features they tend to be be impressed with the display accuracy out of the box. They waited until they could get enough OLED screens to handle their demand. But they also wanted certain levels of color accuracy, I assume non-pentile, and something that could handle avoiding burn in for the expected lifetime of the phone. That must have taken time. Screen to body: I suspect they knew they were getting close on the iPhone X design and wanted it to really stand out, so they stuck with the forehead/chin longer than others. Total guess though.