The pixel density of a phone screen is vastly higher than a TV or computer monitor. A 1080 27" gaming monitor has a pixel density of 91, a 4K 50" TV has a density of 88. An ancient samsung galaxy S4 phone (1080 screen) has a density of 440. In other words you don't need such resolutions for a tiny little screen, it's just marketing like selling cameras with ridiculously high resolution.
Ok. Thank you. That makes sense.
One of my phones has a 5.7" 2K screen (515 ppi). It's ridiculous. Only paid $30 (used) so doesn't really matter.
On a desktop monitor higher resolution actually helps since you can fit more on screen (and actually read it). 2K at 27" is nice. 4K might work at that size.
Even 480p at 18 inches from your eyes is the same pixel density as a 77-inch 1080p TV from about 9 feet.
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