Countless reports claim that the 2017 iPhone 8 (or will it be a >$1000 iPhone X?) will use AMOLED displays for at least one variant. Most of these reports suggested that Apple want to use a flexible curved AMOLED display.
TrendForce, following talks to supply chain sources, now says that Apple was not happy with the production yields and drop-test results of those flexible OLEDs, and the company decided to adopt a flat display (with rounded edges, what is called 2.5D glass). This design is similar to the one used in current iPhone models.