They have Gorilla Glass 3 - covered circular P - OLED displays with ambient brightness sensors (even without a «flat tire»), as well as new Snapdragon Wear 2100 processors and rotating crowns for a new form of input. (androidcentral.com)
Below the OLEDs there is also an LED light strip that adapts to ambient brightness when the brakes are applied. (netcarshow.com)
A light sensor detects the ambient brightness and determines when to turn the headlights on or off, while also increasing the illumination of the wiper switch and instrumentation for good visibility. (hondanews.com)