GNOME – Desktop Environment with the best Wayland support today. Really, I try to run KDE on Wayland – it works, but without word
stable. Here is GNOME/GTK+ applications that work native (without XWayland backend) in GNOME Wayland session:
GNOME System Monitor
GNOME Character Map
All general GNOME applications works nicely in Wayland session. With some heavy apps like LibreOffice I have problems with performance, typical apps works faster with Wayland. Some information about video demonstration: VP9 codec from Google is not the best choice and GNOME Recorder is currently unstable: you can see some freezes and slow speed of the interface. Guess your question “GNOME Wayland session is ready for everyday using?” – answer – yes.