Apple has teamed up with LG and Valve to invest in eMagin, a company that has developed industry-leading technology in OLED microdisplays for use in AR and VR headsets. The move is indicative that Apple could be on track to release a headset in the near future.
https://www.notebookcheck.net/Apple-LG-Valve-teaming-up-for-investment-in-eMagin-for-VR-and-AR.282636.0.html