Marco Arment Marco.org comments:

Since iOS’ launch in 2007, people have devoted a lot of time and money to copying the UI. Samsung, of course, is the biggest offender, but the copying has gone far beyond them: almost all modern smartphones and tablets have parts that resemble the old iOS UI. (Some have more parts than others.) iOS mimicry has even widely infected web design, especially those horrible “mobile” blog themes that try to look like an iOS app.

Read more at: iOS 7 As Defense