According to research note from Barclays, obtained by MacRumors, all three iPhone models this year will adopt True Tone technology that's currently available only on the 9.7-inch iPad Pro.
The research notes states that both Apple's rumored all-new iPhone 8 model with an active-matrix organic light-emitting diode (AMOLED) display and the iterative LCD-based iPhone 7s and iPhone 7s Plus will each include a “full spectral sensing” ambient light sensor to support a “True Color” screen.