On Monday, September 18, 2017 at 9:31:43 PM UTC-7, jfitch wrote:
The specs for the iPhone X have been publicly available for a while now. Yes it will have an OLED screen, so it does not "remain to be seen what apple will do", they have already done it and publicly announced it.

The iPhone 8 has the same LCD display of the 7, so it will be the same brightness. The hope for the iPhone X is that it uses a Samsung OLED display, capable of much higher brightness. It remains to be seen what Apple will do, but it is a competitive market and Samsung phones with the OLED display are brighter in sunlight.