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In my initial look at Android 4, the first thing that impressed me was its cleaner interface. A closer look showed that the new, simple “Roboto” font helps to give Ice Cream Sandwich’s interface its crisp look.
Android 4’s new simple interface continues to impress with its use of folders - the Google Apps in the lower left corner - and its use of virtual buttons for Back, Home, and Recent Apps on the bottom of the display.
The Recent Apps button gives you easy, quick access to your most recently used applications. I expect Recent Apps will become a very popular destination for most users.