https://techcrunch.com/2017/11/14/apple-could-reportedly-add-truedepth-features-to-the-rear-iphone-camera/

Apple has packed a ton of sensors into the notch of the iPhone X. The TrueDepth camera system powers many features, from Face ID to face-tracking technology using ARKit. It also lets you do selfies in Portrait mode. According to a new Bloomberg report, Apple now wants to improve the rear camera with 3D-sensing capabilities.

Bloomberg says that Apple won’t use the exact same technology in the rear sensor. The iPhone X currently projects a grid of thousands of laser dots and look at the distorsion of those dots on your face.