Acura's Precision Concept introduced the company's new grille. Which you can't see here because the only image Acura chose to release is the car's rear 3/4 view. BMW brought along the 2002 Hommage, now wearing a livery inspired by a 1970s racer. Unlike the rest of the concept cars seen here, you'll be able to drive the Bugatti Vision Gran Turismo—digitally,...