just updated my Lumia 620 from Nokia Software Updater...just now, nice to see all the goodies....
1. glance is there
2. colour profile (enhance and neutral adjustment)
3. Separate ringtone each for Call, SMS, Email, Voice mail
4. Data Sense (within Wifi setting)
5. Extra Ringtones
6. Obviously Nokia Smart Cam
7. No double tap wake up for Lumia 620 and no FM Radio
Thats all I can observe little different for the time being
For those who would like to do the same updating please backup you contacts sms...etc from Settings/ backup
Download Nokia Software Updater 5.0.8 and it will do everything for you... including downloading and installing,
After which all you data which are backed up will be synced automatically.
All applications will be downloaded automatically unless you specifically cancel the download manually...so no worry which app i used or not used.