Are Robots Going to Replace Teachers?

As computers get faster and smarter, it stands to reason that robots and artificial intelligence will replace any job that they are able to do more cost effectively. If a robot can do it just as well for cheaper, it will. What does this mean for teaching? They claim that artificial intelligence will have the ability to teach children more effectively than humans within ten years. I believe this conclusion is based on false assumptions about the purpose of education and what teachers do.