Okay, I'm a screen real estate junkie. Be forewarned.
But there are some definite limits on how high of a resolution you'll want to run on 14-15" screens.
If you're plugging into a larger desktop-class monitor or a large format monitor/TV, feel free to ignore.
If you're gaming on a 14" screen, you do NOT want to try pushing a 4K display, or even a 1920x1080.
The details are simply way too small, resulting in a nearly unplayable experience.
With 15", stay below 4K. 1440p is probably all you want to do when gaming on a laptop screen.
With my laptop, I basically will use it for maintenance functions in game, but trying to actually mish is an experience in pain and poor control.
I didn't realize how bad it'd gotten for me as my main machine was down for a couple months and I was using my laptop with an external monitor.
I also rediscovered how much I LOATHE 16x9 as an aspect ratio.