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SvennoJ on 05 June 2024
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Soundwave said:
HoloDust said:

I don't think they need to go for 4K per eye - Vision Pro is not 4k by the way, it's 3660x3200 per eye, 34PPD. With resolving power that is actually worse than Quest 3.

I think something like Pimax Crystal Lite should be their "sensible" solution for Quest 4, 2880x2880, with 35PPD.

They should go as high as they can IMO, the pixels do matter, I notice when watch big screen movies on the Quest 3 there's still a pixelated effect that leaves a bit to be desired, I've heard on the Vision Pro watching movies in 4K is mind blowing, if Quest can get there but offer something like that for a much lower price I think that would be a really nice killer feature they could tout. 

They need to improve the software too, the Netflix and Youtube apps are outdated and there should be a native Disney Plus app. 

Yes, pixels do matter and you can up sampling techniques are getting better and better to 'fill in the gaps'.

For 20/20 vision 30 degree fov was deemed the optimum viewing angle for 1080p tv. That's 64 pixels per degree, which correlates to 30 cycles per degree (60 pixels per degree) for 20/20 vision.

VR currently covers 110 degrees fov.  3.67 times more than the optimal viewing angle for 1920 pixels wide. Therefore VR should aim for 7,040 x 7,000 per eye to match HDTV quality at 110 degrees fov. 4K per eye is essentially still lower than the HDTV standard.



To get the sharpness of 4K TV in VR you need to go even higher, although 4K TV is more for sitting closer / bigger screens, increasing the FOV. Human vision can still sort of see an improvement up to 100 degrees per degree, yet 60 is enough, 80 is ideal. (Above is kind of a waste, hence 1440p upscaled to 4K looks good enough on 4K TV and often indistinguishable from native 4k)

For the perfect headset, offering up to 220 degree fov combined




Each individual eye has a horizontal FOV of about 135 degrees and a vertical FOV of just over 180 degrees.

At 60 pixels per degree you're looking at 8,100 x 10,800 per eye
At 80 pixels per degree you're looking at 10,800 x 14,400 per eye

Eye-tracked dynamic foveated rendering can make rendering these kind of resolution possible, as only a few degrees ever need to be at full detail / resolution. Yet the display tech has to get there first.

It's entirely achievable in the future, Pimax already has 6K dual qled screens, coming Q1 2025
https://pimax.com/pages/pimax-12k

Yet Quest 4, next budget headset, needs to focus on eye tracking and dynamic foveated rendering. There's more to gain there now than higher raw resolution for a standalone headset.