You can spin magnets above a copper surface and create a board that hovers, albeit not very high, but it does hover or you can freeze a superconductor and have it float above a magnetic track and also get a hover effect. The dream of course is to get a hoverboard that bounces under your feet as it floats above the ground but does not limit you to a track or localized area. Colin Furze comes close with simulating that hoverboard feeling while creating something that will still take you anywhere a skateboard will go.