Aero is named for the glossy Aero Glass design of Vista, so XP was like the precursor, before they had the window compositor that allowed such effects. (As othe

Aero is named for the glossy Aero Glass design of Vista, so XP was like the precursor, before they had the window compositor that allowed such effects. (As others in the thread pointed out, OS X did it first, it could well be called Aqua aesthetic. But I don't think they did blurring in the first OS X.)