Color-Perception-Guided Display Power Reduction for Virtual Reality
immersivecomputinglab.org
immersivecomputinglab.org
Green OLED subpixels use less energy per lumen than red and blue subpixels, so if you're already doing foveated rendering, you can save some additional power by green-shifting the parts of the display outside the foveated region.
(But note that foveated rendering isn't actually used anywhere in practice, and the Quest 2 has an LCD panel not an OLED, so it can't save any power this way.)
Said another way, even if the color transition is imperceptible, it might have noticeable effects.
A more complex approach might need to keep higher fidelity color around the edge of objects or some such thing.
So in theory, assuming the display can keep up with eye movements, it should never show you a tightened or limited colour range that you are actually capable of detecting through your eyes.
I suspect it'll be subtly detectable in a couple of ways though, either through rapid eye movements (though I admit I have no clue how fast eye tracking/screen response can be), and secondly (more confidently) that your nose will shine green in the reflected glow of all the green pixels they're cleverly shining where you can't see them directly, and you can definitely see your nose.
I don't use a Quest headset, but on the HP Reverb G2, you can't see your nose at all as long as the face gasket is being properly worn.
In the video, the narrator claims the filter is not noticeable by a high percentage of people, but I find this extremely hard to believe. It looks like the green tint in the city of the original Matrix movie.
So _if_ they do it right, this should not be possible to notice. That "if" is a big one though.