A Swedish company called Rotundus has developed this wicked-looking self-balancing mobile camera-bot, which noiselessly cruises around at up to 6 miles per hour. It can be remote-controlled or preprogrammed to navigate via GPS. Even cooler, it comes in both smooth-surface and rough-terrain versions (pictured above and below, respectively).
Those little knobs you see on the rough-terrain version will apparently make it better able to traverse sand, mud or snow.
There's no word on whether the ball can also be used for Pilates, like the bottom of the E-Volo Multicopter, but I'm sure their engineers are looking into it.