Imagine never having to drag your suitcase through the airport, scramble for a charging port or outlet, or worry about your bag's weight. That's the promise of the Travelmate Robot Suitcase. Using a combination of sensors and a smartphone app, it can follow behind you automatically, matching your pace and moving as fast as 6.75 mph. Its 360-degree Omni wheels let it move whether it's vertical or horizontal, allowing you to stack extra gear on top. The same battery that powers its movements also fuels a USB port and standard outlet and offers four hours of life in autonomous mode and up to 100 hours of standby. A GPS chip lets you track its location, the built-in scale ensures you're never over the limit, and the handle turns into a desk for your laptop or tablet. Available in three sizes, ranging from a carry-on to a multi-day case.