Don't know if that question's for computerlove or not but I'll answere for him since he isn't here.
I would go for the surrealism retro look, a mesh between the 20's and presence. Kind of a concept off of Jules Vernes novels. A future that wouldn't look exactly like the future we see today but of then. A little bit like Gotham City in Batman. It would rock!! !
Examples: Flying pirate ships instead of airplanes or spaceships, Gawdy people dazzled in jewelry with some purposes of holding secret cameras, non cell communication, and recordings, buildings of a deco-art style, and some exotic plants that look a little out of place like mangrove trees.
I don't know I would probably have to draft this out to get a better idea but it's there.
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I live as I choose or I will not live at all.
~Delores O’Riordan