While all those rendering are, as the thread title suggests, Sexy. They all look like just that, renderings. Are any of these actually in existence?
Here are a couple of pics from my home town, while not so futuristic as the above renderings I do think they are both pretty sexy in their own right.
Salt Lake City and County building. (Salt Lake City's City Hall)
image courtesy of wikipedia
Salt Lake City Main Library (atrium pic)
image courtesy of AIA
And a few pics with both
image courtesy of APEM
image courtesy of james