Offtopic:
It can update apps, just ovi store application and ovi store integration for harmattan is poor, though application is better than on n900, but n900 at least has package manager.
Anyway so u say you get updates notifications when app is updated on ovi? Coz if you do you are single person in the world, as to update you need to go to ovi store app and go to download history and update app by app, while with apps.formeegoo.org you get all notifications (like when you get pr update)