High DPI screens are able to render text without aliasing, and that makes a significant difference, especially with less-than-perfect eyesight.
What you're saying is true insofar as I had to squint up to a 1080p screen at 13" to actually see the pixels. But everything was slightly blurry, and switching to a "Retina" (1600p iirc) screen fixed that.
Which was the lack of subpixel aliasing: you can make those screens look blurry as well, by turning it back on. But a 1080 without it just looks like it has janky text rendering.
An actual 4K screen is unnecessary at 13", imho, but the extra pixels are harmless except in battery life. I do detect a real difference in textual rendering between 170ppi and 227, because it's the difference between leaning on subpixel aliasing and turning it off while still getting good results.
High DPI screens are able to render text without aliasing, and that makes a significant difference, especially with less-than-perfect eyesight.
What you're saying is true insofar as I had to squint up to a 1080p screen at 13" to actually see the pixels. But everything was slightly blurry, and switching to a "Retina" (1600p iirc) screen fixed that.
Which was the lack of subpixel aliasing: you can make those screens look blurry as well, by turning it back on. But a 1080 without it just looks like it has janky text rendering.
An actual 4K screen is unnecessary at 13", imho, but the extra pixels are harmless except in battery life. I do detect a real difference in textual rendering between 170ppi and 227, because it's the difference between leaning on subpixel aliasing and turning it off while still getting good results.