4K on a laptop screen is pretty pointless TBH, you just end up using scaling to make everything bigger, it reduces battery life and if you want to run games at 4K you're going to be running out of GPU grunt much sooner.
Better to have a decent quality FHD panel and run things comfortable for the next few years.
I've got an XPS13 with a 3200x1800 panel and at native res it's laughable, everything is tiny - so I end up using 200% scaling. Should have just had a full HD panel, run at native res and had 2 or 3 more hours battery life.