The bulk of the gconf->gsettings migration in GNOME application has happened in f15, when GNOME 3 was introduced. Since then, we've been installing .convert files in /usr/share/GConf/gsettings/ and running the gsettings-data-convert tool at every login.
I think it is time to declare the migration done, and phase out those .convert files. I'd like to propose this as a goal for f20.
Matthias