This single-wheel skateboard may be the closest humanity comes to actually inventing the hoverboard in this lifetime.
The battery-powered, single-wheel skateboard from Hoverboard Technologies offers enough speed, power and balance that riders can easily imagine they are traveling on a futuristic vehicle. The single-wheel skateboard has on-board lights and speakers, as well as "ground-detecting sonar" that automatically keeps the board balanced. It reaches a top speed of 20 miles per hour and has a battery life of 12 miles with a standard battery and 20 miles with an extended one.
The single-wheel skateboard may not be enough to convince sci-fi sticklers that the hoverboard is actually among us, but it is a fast, eco-friendly and fun ride -- a great alternative to bikes, scooters and traditional skateboards.