The hoverboard prototype comes from the gravity wizards at Hendo, a company combining sorcery science and Kickstarter to design, manufacture and market a functioning Back To The Future style hoverboard.
Per the Hendo Kickstarter page: “The magic behind the hoverboard lies in its four disc-shaped hover engines. These engines induce an opposing magnetic field in the surface substrate below that provides lift, levitating our board off the ground. While our hoverboard is primarily intended to be self-propelled, the actions which stabilize it can also be used to drive it forward by altering the projected force on the surface underneath it.”