Flat design
UX talk in the Times: The Flattening of Design:
While Microsoft was flattening its interfaces as if it were a child pushing down on a bulge of putty, its competitors – including Apple and Facebook — were focused on skeuomorphism, a type of look in which, say, a note-taking feature on a Web site or in an app would look like a spiral-bound notebook, a reference to the real world look of a notebook.
Apple really has pushed hard for skeuomorphism, something I never warmed to. As the article notes, phone screen limitations have been a big influence on the current trend, but it seems more accurate to say that touchscreen interaction has been the true driver of flattened interfaces.