Originally Posted by ARROW-AV
Absolutely correct. 'Extra pixels' don't matter beyond the respective HVP threshold viewing distance
A native 4K single pixel checkerboard test pattern will be perceived as a solid grey screen and identical as compared with if it were displayed downscaled to HD 1080p resolution once you are viewing it beyond the respective HVP threshold viewing distance.
In other words you won't be able to perceive any difference
Hey, you think I'm writing nonsense? I can verify my observations and indeed can replicate them on the TV I'm using to type this.
I have a computer, it's got Photoshop, feeding 4K to a 4K TV.
So, right now, in my own home, as I type this, I can tell you in no uncertain terms, that I have to get about 30+ feet away from the 75 inch TV that I'm using to see no stairstep whatsoever—just a smooth (slightly) diagonal line. That's with sharpening off (as it should be) It's a question of seeing one single pixel, or not. I can see that stair-step transition from quite a distance.
Yes, at such distance, a single-pixel checkerboard looks grey. Not arguing that. Indeed, the checkerboard looks grey a lot closer than 30 feet, in 4K.
Interestingly, with 4K anti-aliasing can't "fix" it, the line looks like it's getting fatter and skinnier, even from 30+ feet. So either stair-steps, or fat/skinny. With 8K the anti-aliasing would be more effective and the diagonal line would look much smoother, but still sharp, from a much closer distance.
Another interesting thing is from how far away you can see a one pixel wide, screen-width black line on a white background in 4K
You can see it from very, very far away. It does not disappear and become white. I had to exit my house and cross the street before it disappeared. Eyes are capable of discerning that line despite it being much thinner than what you should be able to "see."
I'm looking for the maximum distance at which I can see, make out, however you want to define it, the difference a single pixel can make. Exactly as described in the article itself.
There is no chart in the world that's gonna replace the fact that I can replicate these effects right now, as I type this.