According to display industry analyst Ross Young the new PlayStation VR2 will have an OLED screen with the highest pixel density of 'well over 800 PPI.' Sony already disclosed the per-eye resolution of the VR2 screen and quick calculations return that it may be at least an inch larger than the panel of the original PS VR.
https://www.notebookcheck.net/Sony-PlayStation-VR2-to-sport-OLED-display-with-a-larger-size-and-the-highest-pixel-density.613370.0.html