According to a Bloomberg report, Apple is planning on releasing its rumored AR glasses sometime in 2020. The glasses, while still in development, may eventually become a replacement product of the iPhone. However, a lot of work remains to be done, including the development of a "killer application."
https://www.notebookcheck.net/Apple-of-my-eye-Apple-to-release-AR-headset-in-2020.439949.0.html