Web application interfaces have already been ruined for desktop users by trying to serve both mobile/touch and desktop/mouse. It would be a real shame if other native software followed suit.
It's not at all obvious it can be done well, as the input methods are different, and the UI should match them.
At any rate, the video establishes how it is done poorly. Terrible GNOME UI, lots of empty space, functionality mostly hidden from the user, if not completely inaccessible.
