Lexus just unveiled its new Lexus Hoverboard. Yes, Lexus, the car company, just unveiled a hoverboard inspired by the 1989 film, Back to the Future II. We’re one step closer to experiencing the 2015 Marty McFly did. Unlike Marty’s hoverboard, this one can only be ridden in a specially designed skate park in Barcelona so far. The board works by using magnets that are surrounded by liquid nitrogen a