One of the most striking cars at the show, this concept coupe from Buick signals a possible new design direction for the brand. The grille is unlike any seen before on a Buick. The sleek, broad-shouldered exterior is both muscular and elegant from certain angles. The Avista’s interior, with its light-colored perforated leather interior, brushed aluminum trim and advanced electronics, looks like it was lifted straight out of a Star Trek movie. Except for the paddle shifters behind the steering wheel, there are no buttons, switches or knobs on the dash. All the vehicle’s major functions are controlled via touch screen. General Motors design chief Ed Welburn says there is no technical reason why the car could not be built, though it might need a B-pillar for roof strength. It’s a rear-wheel-drive car, something not seen in Buick’s lineup since the late 1980s Grand National and GNX. Pressure is already mounting for GM to build the Avista, which rides on a version of the company’s Alpha platform that underpins the Cadillac ATS and Chevrolet Camaro. Grade: A