GREAT WONDER!!!! THIS HOVERBOARD LEVITATES

Recently, Lexus introduced a short teaser video for SLIDE, a hoverboard that appears to not just live up to our Back to the Future II dreams but, at least an improve on them. Better yet, it’s more science than science fiction. Here’s how it works. MAGNETS!!! purely magnets
According to Lexus, its hoverboard relies on superconductors and magnets, which combine to repel the force of gravity and lift an object. With a superconductor you don’t need to have an oscillating magnetic field, Instead you have something called the Meissner effect, which essentially says that when you take a magnetic field near the superconductor, it induces current in that superconductor, and creates essentially an image magnetic field on the other side of the superconductor. You create current, but since it’s a superconductor, the currents don’t die away. So you don’t need oscillating magnetic fields. You can have a magnet that levitates above a superconductor or vice versa, a superconductor that levitates above a magnet.
As for the wisps of smoke you see rising from the sides of the Lexus board? That’s not just for effect  That’s liquid nitrogen, cooling the superconductors below their transition temperature. The temp at which it becomes superconducting. Just how cold are we talking? -321 degrees Farenheit, says Palm, who also cautions that it’s not quite as extreme as it sounds. “That sounds very cold,” . “but liquid nitrogen is actually a byproduct of the steel industry, so it’s pretty inexpensive.” It’s the same principle as the dry ice you played with in elementary Chemistry, just around three times as cold.
When the liquid nitrogen runs out, the superconductors warm up and the hoverboard stops, well, hovering, until you top it off again.
It will be fun if it's finally mass produced, you know, levitate anywhere, like a witch.