Instead of using a standard 3D ToF sensor for its new iPad Pro, Apple has upped the ante by using a LiDAR scanner instead. It has opted for the more advanced technology to take the augmented reality capabilities of the iPad Pro to the next level.
https://www.notebookcheck.net/A-closer-look-at-the-LiDAR-scanner-on-the-new-iPad-Pro.458447.0.html