Sharps president Tau Jeng-wu recently affirmed Apple's switch to OLED panels for their next generation iPhone in a speech held before students at Tatung university in Tapei. Apple is said to release at least one iPhone 8 model with curved OLED screen next year.
http://www.notebookcheck.net/Apple-iPhone-8-Sharps-president-confirmed-switch-to-OLED-panels.182018.0.html