[sirn]

In iOS7, menu transparency that blur the content below it give a sense of depth in a similar way drop shadows do. UI elements are in the top layer, with content in the lower layer. Parallax in the home screen is also there to add depth, as well as a very subtle transparency in some app that allow you to see your (blurred) wallpaper while in app.

There are also some interesting use of solid color to indicate interactable elements (icons or links that are part of the UI are in the same solid color) that will be greyed out when there are layer above it (e.g. via action sheet).

Most of these are not in the iCloud website, however. And I'm still not sure I like the new visual style.