I posted about this in another forum and here's the summary of currently noticed changes from the manual in this thread.

- It will support internet video calls. Straight from contacts.
- Night Photo and Night Video modes.
- Video recording resolution support.
- Mail widget
- Official support of portrait mode in web browser.
- Native Geolocations support for web browser.
- Volume button can be set to either volume or zoom for browser.
- Themes for Smileys and Conversations.
- MfE support enhancements. (Can accept/decline meeting requests)
- SMS option only shows for mobile phone numbers. (not for landlines)
- File Manager allows sharing of any files. (no more need for Petrovich)
- Clear device data and restore settings option. (possibly full factory default)
- Group chat possible in Instant Messaging
- Search by typing for applications in App Launcher.
- Sticky tags for videos and photos.
- Away status for status of Contacts (page 52)
- Can disable Show Captured Video after finishing recording. (page 82)
- Media player now supports MAFW Plug-ins. (page 91)