From the Ovi Store Publishing blog:
"Users of S^3 devices will be able to review and apply updates to apps they’ve downloaded for Store. Ovi Publish is also enabling the following features: extraction of version numbers automatically and exporting to the clients.
After updating to Store 2.8, when the user launches the Store client and signs in, the client automatically checks if any of their downloaded apps have an update available. If there are updates, the user will see a green flag in the corner of your screen by your “Account” tab. Touching the flag will take the user to his account page where he can choose to update “All” or select individual apps.
This is one of the most requested features for Ovi Store. This feature will be rolled out initially to S^3 devices next week. App update functionality for other device family clients will be rolled out continually thereafter."
In addition, there are 'discovery' improvements in terms of suggested related applications. Watch this space for more, when the new client hits.