http://jalopnik.com/this-is-the-hoverboard-weve-all-been-dreaming-of-1774176409

“Today, we’re not ready to fly above land. We’ve spent four years getting it to
fly, and now it flies. Technically, it might be able to go 3000m high, or 200
kph. The reality today is that all the systems function well, the top speed is
80 kph, the max height is 35m, and I’m able to take off and land with 3 out of 4
turbojets operable. But today I’m not ready — and the machine is not ready — to
continue flying if one of the turbojets fails mid-flight.”