How realistic are those robots in Star Wars?

Computer Science and Engineering Professor Robin Murphy of Texas A&M University has taken a serious look at the robots of Star Wars fame and judges how realistic they are in a recent Science Robotics Focus piece--in it, she suggests some aspects of the robots are more realistic than others. Murphy focuses on CP30, the gold, humanoid robot with a British accent, his partner, R2D2 and the cute robot BB-8. Notably, only one of the three is able to talk, and has appendages that resemble human arms and legs. She discusses the possibility of developing such robots and how well they might work. She also compares them to a real-life space robot--NASA's Robonaut, a humanoid robot with arms and end effectors, but no legs.