The primary criticism surrounding the iPhone 7 is that Apple did not do enough to innovate—it feels more like an incremental update with faster hardware than a new generation handset. Apple disagrees with that notion, at least outwardly. Looking ahead, it’s now rumored that Apple will use a flexible curved organic light-emitting diode (OLED)

Source: Hot Hardware – iPhone 8 Will Allegedly Feature Curved OLED Display And USB-C Power Connector