iCloud can store photos taken with the iPhone and then automatically sends the picture content to be stored on a Mac, AppleTV, or even the user's iPad.
There are several related services, announced
Service mail, Contacts and Calendar used to be called MobileMe now using iCloud. Its push mail service at me.com.
App Store and now supports iCloud iBookstore. So the apps and purchased books on one device can be downloaded also in other devices they own.
iCloud Backup is a backup service via WiFi is active when the iPhone, iPad or iPod Touch in- charge. If you change the iOS device, users can directly download from this backup.
Photo Stream is a special