Well, real in the sense that opposing magnets suspend this Back to the Future model in the air without any structural support. French artist Nils Guadagnin made it for an art installation:
Integrated into the board and the plinth is an electromagnetic system which levitates the board. A laser system stabilises the object in the air. In the making of this work, this artist was thinking about different ways of presenting sculpture. In fact it's a reflexion on the multiple possibilities of how to give a sculpture full spatial autonomy.
via Geekosystem | Artist's Blog | Previously on Neatorama: Back to the Future Hoverboard Auction