updated 02:20 pm EDT, Wed August 14, 2013
Apps, icons get new look, interface changes
Apple has redesigned the iCloud.com beta website to take after the look of iOS 7. The overhaul extends from icons and fonts through to many interface elements, such as the layout and buttons in Calendar. The website also operates somewhat differently; instead of having to jump back to the main menu to switch to another app, for instance, clicking the "iCloud" name in the upper-left will pop up a quick-switch panel.
The beta code will presumably be pushed to the main iCloud.com domain once iOS 7 itself is released, likely next month. One gap at the moment is that the iWork for iCloud apps continue to use the iOS 6 style -- Apple may be waiting until it updates iWork for iOS to carry forward. It's unclear when that will happen.