In a convergence of future cultural icons, “Back to the Future Part II” premiered in movie theaters the same year that the Lexus brand launched in the United States. Fast-forward 26 years, and Lexus is about to bring one of the classic film’s famous props to life. The above video teases a fully functioning Lexus Hoverboard, which will make its futuristic, full-action debut on the Lexus YouTube channel this Aug. 5.