According to Apple analyst Ming-Chi Kuo, Apple is planning to release new iPad Pro model with 3D ToF sensor on the back in 2020. This new 3D ToF sensor will enable advanced AR features and improved camera experience. Apple is also planning to include read 3D ToF cameras in iPhones releasing in 2020.
In 2020, Apple is also planning to launch its own AR headset. Unlike Microsoft HoloLens, which is a standalone AR headset, Apple will sell its AR headset as an accessory to iPhone and iPad. Most of the computing required for the AR headset will be done in iPhone or iPad and the data will be transferred to AR headset for immersive experiences.
Source: Macrumors