Originally Posted by epic1337
Originally Posted by CJRhoades
That'd still be too small. 8k at 27" is 326ppi which is right about the limit of vision... at 11" from the display. Sit 11" from a display and tell me how comfortable that is. At minimum for a computer monitor you'd be looking at 24" of viewing distance. From that far away the display would need to be more like 60" or larger to see any benefit from the 8k resolution. That sounds ridiculous (and it is), but at 60" you'd still have 146ppi which is about all your eyes can see from 2 feet. Of course you couldn't sit 2 feet from a 60" display and be comfortable, so you'd have to move even farther back... 8K is just unnecessary for computer monitors outside of certain tasks. 4K is plenty.
theres another reason why "Higher PPI than the eye can perceive" could give you better image clarity, its that image or text will be rendered much smoother.
to point out, texts displayed at a single-pixel ratio would look tiny indeed, but how about scaling the text's lines to be 3~5pixels thick? the "O
" would look far more smoother and circular.
edit: or to put it into another word, its much like the concept of "oversampling".
Visual acuity is measured by the smallest letters that can be distinguished on a chart and is governed by the anatomical spacing of the mosaic of sensory elements on the retina. Yet spatial distinctions can be made on a finer scale still: misalignment of borders can be detected with a precision up to 10 times better than visual acuity.
Your eyes build a picture by moving, constantly and subconsciously, even if you fix your gaze your eyes are moving. Actually image retention is quite poor and if your eye ever did stop moving completely the image would go blank within a few seconds (it just goes gray). If you're trying to detect a small space between two lines (a fine mesh or grid) it's going to get blurred out pretty quick compared to detecting fine detail on a high contrast edge where your individual receptors have lots of room to switch from seeing "bright" to "dark".
Looking at a grid the receptor is just constantly going "bright dark bright dark" and never gets a clear signal.
The best practical explanation I can give is it's the difference between being able to see texture and being able to see outlines.
If you're looking at a consistent texture, like smooth sand, cement or pavement, with average vision and a 50" screen viewed at six feet, then going from 2K resolution to 4K resolution probably won't do you much good.
However, 4K resolution will be useful at the same viewing distance and the same screen size when you're looking at high contrast edges, like the pupil of an eye, lettering, basically any patterns (lines, curves and corners, or any cracks and irregularities in the cement/pavement). Your brain is hardwired to find these things and it's very good at it.Edited by ILoveHighDPI - 10/3/15 at 11:08am