Just after the upgrade I can say that everything looks crisper. This might be because I just recompiled Emacs for this week (I follow master), or because default fonts changed, or because Gnome 3.24 -> 3.26, or because Wayland, or some of all of these; but there is a noticeable change. And Gnome is way more snappier. I'm really pleased after first reboot.
How so?