Looks like a single wheel segway:
Honda has developed a new personal mobility technology, U3-X. It is a compact experimental device that fits comfortably between the riders legs, to provide free movement in all directions just as in human walking forward, backward, side-to-side, and diagonally. Honda will continue research and development of the device including experiments in a real-world environment to verify the practicality of the device.
This new personal mobility device makes it possible to adjust speed and move, turn and stop in all directions when the rider leans the upper body to shift body weight. This was achieved through application of advanced technologies including Hondas balance control technology, which was developed through the robotics research of ASIMO, Hondas bipedal humanoid robot, and the worlds first* omni-directional driving wheel system (Honda Omni Traction Drive System, or HOT Drive System), which enables movement in all directions, including not only forward and backward, but also directly to the right and left and diagonally. In addition, this compact size and one-wheel-drive personal mobility device was designed to be friendly to the user and people around it by making it easier for the rider to reach the ground from the footrest and placing the rider on roughly the same eye level as other people or pedestrians.
Hat tip CNET