- New maps with more information: Including turn by turn navigation and traffic report.

- Smarter Siri: The virtual iPhone personal assistent now can talk about sports, movies and restaurants

- More intregration with Facebook: Share photos from the Camera app, locations from Maps, links from Safari, high scores from Game Center, and more. Or post a status update from Notification Center or with Siri.

- Passbook: No more hunting through your wallet searching for gift cards, coupons, passes, or tickets. Passbook keeps everything organized — and handy.



Source: Apple Website