Screen sharing seems a critical feature to enough people to rise well above mere “minor feature” if the goal is to replace Xorg. That was probably true 12 months ago, but definitely true 8 months ago.

If the goal is to have a different display protocol that a significant fraction of the possible user base can’t reasonably use as their root display because it provides yet another way in which “Linux isn’t ready for this to be the year of the desktop”, that’s a perfectly reasonable aim, but it seems like Wayland is targeting replacing X, in which case supporting screen sharing (and recording) is probably not an ignorable “minor feature degradation”.