I love the concept that robots help people. Think of all the medical advancements that have been made with robots help! Many surgeries have robots as assistants and are fast now. In some cases, people can go home the same day as their surgery. Artificial limbs work much better then they used to. All due to technology and research.
I don't think robots will ever over power humans. Check out this video by Honda and tell me what you think? If you had a robot, what would you want it to do?