The original Oculus Rift had 1080x1200, VisionPro has 3660x3200, field of view is similar. In virtual monitor terms that means a Rift can display a 640x480 monitor and the VisionPro a 1920x1080 one. Still quite far away from Retina, but should be pretty usable, especially since it allows making the virtual screens bigger than a real monitor can be.