Chapter 5. Using iPhoto and iTunes with iCloud
When you have more than one iOS device and love capturing moments with your devices, the Photo Stream app might be the most useful feature for you on iCloud. Photo Stream stores all of the pictures that you captured with your devices. It includes all of the pictures you've taken using the Camera app and also the screenshots from your iOS devices. So, you don't need to resynchronize or resend pictures from one device to another. They're automatically there for you.