Why do I need Wayland? Xorg works just fine. Actually better than fine, since you can actually run a wide variety of window managers without having to resort to xwayland
xorg is a security nightmare. Also, wayland itself works as well (even better performance wise), it just takes time for all the applications to catch up and enable it as a backend.
KDE and Gnome work fine with the nvidia proprietary driver on Wayland.