I'm not sure I would call this "Flat Design" a new design style. You see minimalism and a perfect balance between content and form in most mature design fields,

I'm not sure I would call this "Flat Design" a new design style. You see minimalism and a perfect balance between content and form in most mature design fields, and I think this is more of a sign that web design is not being dictated by trends anymore. If you want "Flat Design", take a look at the 1981 Xerox Star.