[Joeri]

The problem of 4k is efficiency. 1440p is already 2x at 14 inches, which at normal viewing distances is about as sharp as people can see. Going up to 4k does not really improve visual quality, but it dramatically increases the pixel count that must be rendered, which burns through a lot more power. 4k laptops have worse battery life and worse display performance than 1440p laptops, but they offer no upside for those downsides.

There is a reason macbooks, still the gold standard for hi dpi rendering, have never had 4k panels.

[sneak]

> Going up to 4k does not really improve visual quality

Speak for yourself. The 4k display in my XPS is my favorite output device I have ever owned. I wish my rMBP had that kind of pixel density.

[Kletiomdm]

Just be because apple does something doesn't mean they are right.

There have been plenty of counter examples.

Anyway, my smartphone has 1000x2000 resolution on a 6" display. The text looks perfect.

They can make very high resolution displays with very efficient energy consumption.

Feel free not to need it but my DSLR and my smartphone both take 4k and higher resolution pictures for years.

Yes I want such a display on my 14" laptop.

I do like the MacBook pro screen and it's much better than 1080p. True.