Meet Travelmate: a robotic suitcase that autonomously follows you and avoids obstacles. It has a variety of sensors to move through crowds. It has vertical and horizontal modes and can go up to 6.75mph. Travelmate can recognize gestures and voice commands. It measures the weight of what you put inside and lets you monitor its location on your phone.
Travelmate is TSA complaint. It combines Bluetooth, GPS, and accelerometer/gyro to make your life easier. Light up LED indicators are also available.[Source]