Over 20 pixels per degree, so that can apply to a 2D movie in VR or the native VR.
(the headset to do that doesn't exist yet)
Edit: that's my idea of high-def... no idea what Mr Musk's is. But at least he's not libelling cave rescuers so that's good.
in layman term HD means a quality that makes the support almost invisible (or very close to the original)
SD is when reproduction is obvious.
ultra HD means you are over what you can normally perceive (and so why most people don't see difference between HD and UHD in normal condition).
So an headset who get screen door effect can hardly claim HD , even if the quality of the content could be HD.
So the pimax 8k is pushing the problem back to the content. It will not make full hd (or even 4k) content better, but at least it will not be the weakest element in the reproduction chain.
So if we speak about VR played on a regular 4k screen (or even full HD ) or retna tablet , that is just a problem of getting good content.
If we put an VR helmet into the equation, device resolution and FOV will be the main criteria (but remember we are speaking about year 2023)
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