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Many of the innovations in Windows 7 are more about estetics and eye-candy than anything else. Some of them are downright silly; such as this one:
You’re working on your computer, and you have a lot of windows open. You then need to focus on a specific window, and minimize all the others. That’s done by clicking the title-line of a window, and shaking it, which will make the other windows minimize.
You can still use the keyboard shortcut Win+d to achieve the same result.