One word: HiDpi
Details: try a HiDpi display and a non HiDpi display both connected to the same PC. Nothing but MacOS handles this well. Even Win10 struggles with Windows that straddle the boundary or things dragged across it.
Details: try a HiDpi display and a non HiDpi display both connected to the same PC. Nothing but MacOS handles this well. Even Win10 struggles with Windows that straddle the boundary or things dragged across it.
The Qt and Tk (since 8.6) applications also scale nicely with GNOME3.
The only glitch is that currently only integer scaling works well.
sudo pacman -S gnome
sudo systemctl enable gdm
sudo systemctl start gdm
The last time I used Fedora it worked without extra work (besides setting scaling to 200% in the Display settings).
Things only started working well with GNOME 2.26 and very well with 2.28.
In any case, you have to make sure that you are using Wayland, support for multi-DPI screens on X.org has been terrible for me. Even a single 4k screen is not very consistent in X.org (e.g. the mouse cursor sometimes becomes tiny when moving between windows).