In article , Eric Stevens
wrote:

Is there any 15" notebook PC with a good 4K screen?

retina macbook pros, which have 5k displays and are also are wide gamut
dci-p3. the 13" versions have 4k displays, also a good choice.

2880-by-1800 native resolution is not a 5K display. Check again.

2880 x 1800 = 5184000

there are two ways to classify displays, one is the total number of
pixels (for the above, 5.2k) and the other is the horizontal dimension,
5120 x 2880, which would be 14745600 total pixels.

https://en.wikipedia.org/wiki/5K_resolution
"5K resolution refers to display formats with a horizontal
resolution of about 5,000 pixels."

So you have been caught trying to cheat.

nope. both are used. once again, you are clinging to rigid definitions
and ignoring real world usage.