Maglev - Do you remember Tony Hawk riding the first ever hoverboard in a half-pipe? This magnetically levitated board by Hendo is still in development, and you can see the design progress
Lexus Builds A Fully Functional 'Hoverboard' Prototype That Uses Magnetic Levitation
Lexus develops a functional levitating hoverboard ahead of 'Back to the Future' date - IPWatchdog.com | Patents & Intellectual Property Law