Depends on your distro.

Like on Debian, they have meta packages where the gnome desktop meta package will most likely be updated to include Papers and Showtime, so those will get installed if you have the meta package installed. But typically they will keep the old apps around too since users may expect to have them still.

But Flatpak has so such mechanism to do that. Distros would have to install that stuff manually as part of an update script. But they did recently introduce a way to define which apps should be preinstalled, which should help in the future.