Even when I was a kid, I figured that magnets were the only way to go for any hoverboard built in my lifetime. From out of nowhere, Lexus have announced a prototype of an apparent working hoverboard. If real, it won't be available any time soon, but it's impressive none-the-less.
Nathan Bomey, writing for USA Today:
According to the video by USA Today, the prototype is "a magnetically levitating device, with liquid nitrogen cooled superconductors" that only runs on metallic or magnetic surfaces.
I haven't been able to find anything to fully validate the authenticity of Lexus's claims. Websites like ComingSoon.net, Engadget, and Gizmodo are all saying pretty much the same thing; that Lexus aren't talking much about how it works, including whether or not it's able to hold the full weight of an actual person. But assuming they're telling the truth and that it is fully ridable, it will probably be a while before we find out what it runs on besides science and sorcery!