Some preview of gnome-shell was already present in F12. And sugar spin isn't new either. Well, it doesn't really matter, but still, I'd like to see some more attention paid to present Fedora as "KDE distro" too.
Yeah, gnome-shell was/is present in F12 the same as python 3 for example, but they weren't considered ready to "push to the front" and be advertised as features.