The major downside to FaceTime has been that it only works over Wi-Fi connections, which greatly limits when and where it can actually be used. With iOS 6, users will be able to connect and chat over FaceTime anywhere they can connect with either Wi-Fi or over the cellular network.

5. Passbook

This is another feature that will appeal primarily to the travelers. Passbook is a central repository for store loyalty cards, rewards cards, movie or event tickets, airline boarding passes and more. Passbook can replace a wide variety of cards and printouts, and greatly simplify managing and finding them when you need them.

One of the coolest things about Passbook is that it's time and location aware. It would be nice enough to have your movie tickets or airline boarding passes stored in Passbook where you can easily find them, but Passbook also actually recognizes when you've arrived at the theater or airport and can automatically pop up the necessary "paperwork".

6. Improved Mail app