The_Circles_of_Power, The_Fifth_Element & Blade Runner all provide excellent visuals of how sky cars could interact with GPS navigation & virtual buffers.
The Blade Runner Spinner car:
http://www.imdb.com/media/rm3320748288/tt0083658 ,
http://www.imdb.com/media/rm3320748288/tt0083658 ,
Such a cars would not only have an integrated computer, but in some cases, its own chauffeur Data unit. But don't expect to see anyone like Brent Spiner in a Spinner just yet. Part of the mythology of the Greys involves a similar concept. Some are bio-mechanical beings that are a part of the ship.
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Blade+Runner like The+Terminator movies, provided a fine example of robots being camouflaged as humans.
