yes but the Mac laptop screens are built-in, and the signalling to the monitor goes through very special connectors with many more pins than HDMI or DisplayPort. Apple can do things here that others can't, because they design their own hardware.

this external monitor must work with pretty much any HDMI 2 or DisplayPort 1.2 (maybe 1.1) connector AND the device it plugs into must be able to drive it.

this pulls the display bandwidth requirements down to where a "retina"-class display just can't work unless only the very latest DP or HDMI versions are supported, and that would minimize the number of people who could use this monitor.

expecting monitors to be like apple MacBook retina displays because "apple can do it" is overlooking the realities of external monitors.

we'll get there, but we aren't there yet.