Fabulous news! With Ubuntu throwing in it’s weight there should be a much bigger incentive for for app/toolkit makers to polish remaining deficits in their Wayland backends.
I assume Ubuntu will also continue to make fractional scaling available in the display settings? The Wayland version is AFAIK much better (and upstream supported) than the Xorg one but unfortunately suffers from providing a worse Xwayland experience then default integer scaling - which brings us back to the first issue: apps properly supporting native Wayland.