Relay, a three-foot-tall robotic butler, has been rolling out in a number of hotels across the US within the last couple months, like the Marriott hotel near Los Angeles Airport. Developed by Silicon Valley startup company Savioke, the robot takes the elevator, greets you at your door, and even giggles when you give your stay a positive rating. Relay doesn't have a face, just two tiny white eyes on its main display panel, but its adorability...