More likely than not, dark mode will only be available for the OLED phone. This is because OLED does better battery wise with darker interfaces and IPS does better with lighter interfaces.Actually, that is exactly what Android was from Android 4.x up until 5.x and later. Android was dark by default. Now Android's UI is white as all heck, but I don't really mind it. Though, once I switch to iPhone 7 Plus on the 18th, it will be nice to get a dark mode in iOS 11 at least.