Hints of an Oculus prototype running OLED microdisplays at 2784 X 3000 per eye have been found.

https://twitter.com/SadlyItsBradley/status/1441631555168915457

Also according to him on [spoiler]Discord[/spoiler], one of his sources has told him things that apparently lead him to believe that there will be a Quest 2+ releasing this year, and then a Quest Pro.