Apple is purportedly looking at dropping its iPhone lineup, starting with the 2020 iPhone. This year's iPhone XR successor would be the last flagship LCD model.
The move to OLED wants to enable "more flexible handset design", at the end of an ambitious 2020 iPhone roadmap. We already see this somewhat today with the iPhone XR being bigger than its OLED counterparts.
Try Amazon Prime 30-Day Free Trial
Down the road, Apple has been exploring how to go beyond the rectangular glass of slab. Last year, Bloomberg reported on some of Apple's drastic design research projects.
It is likely that the 2020 iPhone design is a radical departure from what we know today. The 2019 iPhone chassis is expected to become more of an iterative change.
LCD has fallen out of fashion in the past few years because it requires a standalone backlight component. The pixels of an OLED screen are individually lit, allowing them to be used in devices with more irregular shapes. Apple has also been exploring microLED displays as another LCD alternative.
As the industry heads move away from LCD, LCD panel suppliers are scrambling to find new revenue streams. The rest of the WSJ report describes how Japan Display is in such a high degree on LCD orders from Apple.
Falling demand for LCD displays and lower-than-expected iPhone XR demanded impact Japan Display's financials significantly.  On the flipside, OLED makers will benefit if the 2020 iPhone lineup indeed switches to the screen technology across the board.