Don't expect to ride it on solid ground -- much less water -- but what you see above is indeed a hoverboard that floats. Using electromagnets embedded in the podium and a laser system to measure its position, artist Nils Guadagnin has managed to keep a familiar-looking pink plank aloft, a full five years and five months before the real deal supposedly sees common use. Give the man a pair of kicks, a car and a flux capacitor, and he'l
