Sharing the stage with its sister concept, the Q60, the luxe Infiniti Q80 concept has made its grand reveal at the Canadian International Auto Show in Toronto.   The interior and exterior of the vehicle is just what you would expect from Infiniti: tech-friendly, stylish and sexy. The detailed interior features quilted leather seats and the rear passengers each have a touch-screen attached to the rear of the front seat.   The brand-new, downsized twin...