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The automotive future is here, at least in theory. Each year, car enthusiasts from across the country attend auto shows to check out the latest designs. Concept cars are the most popular -- with a wide range of varieties shown. A futuristic prototype with unique layouts, they are made to showcase new styling, technology and more.One of this year's concepts, GM's Denali XT, is a car-based pick-up truck. With the handling and fuel efficiency of a car, it also has a handy pickup bed that can be extended into the backseat for more room, through a unique midgate. Showing the hybrid at auto shows is an opportunity for the manufacturer to gauge customer reaction.Produced for General Motors