iCloud: Apple takes to the sky to challenge Amazon and Google
Like competing cloud services on Amazon and Google, iCloud will let users access music, apps and other material on all their Apple devices, regardless of where the stuff was originally stored. The cool feature, though, is that instead of uploading everything to a "locker," iCloud will recognize what you've already purchased and beam it to all your devices wirelessly. So you won't have to spend hours and hours uploading songs to the cloud servers.
Apple is giving 5GB of storage space free to iCloud users, but music, apps and books bought through iTunes and iBooks, as well as users' Photo Stream, won't count against that space. Users who want to have all their ripped music accessible on iCloud can pay $24.99 a year for a service called iTunes Match.
Of course, in order to do all this, you'll need the latest version of Apple's iOS for mobile devices and Mac OS for desktops and laptops. iCloud will be available in the fall.