First of all, the portrait QWERTY keyboard is suitable for fast, single-handed typing, while a split-screen view lets you check out anything else that is happening in the background while you type. Ovi Maps is also simpler and quicker to search, while you get to take advantage of public transport routes.
Symbian Anna will also activate the NFC hardware in the Nokia C7, making it a whole lot easier to share as well as reading NFC tags on other items. You can experience the Symbian Anna update via Ovi Suite on the PC or over SW Update app on your handset. Since this is one huge download, you would best connect via Wi-Fi, and make sure your phone is fully charged!