Earlier quoted context omitted.
Not really. Windows (Metro) is completely flat, there is no depth and it is very difficult to distinguish controls. The direction Apple is taking adds a bit of depth to help distinguish most controls, similar to Android design guidelines.
Honest question: What depth ? All i see is flat all around.
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.