If you shop online using your phone a new way to get your credit card details into the website using Safari is coming. In iOS 8 users will get the ability to take a photo of the credit card using the iPhone camera and put the credit card data directly into the website you are shopping with.
That will be much faster than having to type in credit card information each time you want to buy something. You can type in credit card details now and have them stored in the operating system for use later.
The catch with that is that stored numbers might not be secure and many users don't want to save their credit card in a mobile device. The ability to scan the credit card rather than type the number will be a nice option.