Apple is Also Switching To OLED Screens For iPhone 8
The current iPhone 6s Plus has a 1080p LCD, the highest among Apple’s smartphones. Android devices have moved to 2560 x 1440 LCDs in some cases, but these panels tend to be noticeably dimmer and use more power than lower resolution screens. OLED displays have the advantage here as the light is produced by the pixels themselves rather than a backlight.
Colors are brilliant and screens are much brighter along with perfect black levels and contrast because black pixels are simply off. This could allow for improved battery life in dark interfaces. OLED panels are flexible too, which has allowed Samsung and LG to sell curved smartphones.
The problem (and the reason Apple is said to be meeting with suppliers so early) is that Samsung is the only company that can produce OLED panels in significant volume. All of its high-end phones have Super AMOLED screens, which are the best displays available on a phone right now. LG is expected to expand production of OLEDs, which it has used on a handful of phones so far. Japanese display makers JD and Sharp might see their orders from Apple fall as Samsung and LG start supplying Cupertino with AMOLEDs.
Switch will happen in 2018. That would be the iPhone 8 generation at that time. So you have to wait a while before you get the OLED panel iPhone.