Human vision has 120 degrees binocular overlap. Older headsets like the Vive og have almost 100% binocular overlap. (extremely) wide FoV headsets like the StarVR have probably only about 50% overlap, so you’d need much less PPD for the same experience. Besides, StarVR developed their own panels, so 100% panel utilization is achieved. Pimax just buys existing panels, which generally will cause less panel utilization.
Can’t wait to try mine wednesday. I’m sure the resolution won’t be as good as the Index or the Pimaxes, but I’d be surprised if the resolution wouldn’t even match the PSVR.