Thinking the relationship between human and robot

in this lecture, mainly we talked about people's life, Alife(artificial life) and robots. Of course, life is a very complicated issue, everyone could have their different definitions. Alife is the system which similiar as life and built by human. For example, the website called "second life" is the artificial life. when you register on the website, you can build your new identity and living in a new cyberspace.
personally, I am more interested in the topic of "the relationship between human and robot". There is a video（video1） which shows some nowadays robots. They are programed to floow human orders. some of them can even sence the enviroment around them. However, they are still programed by human and unable to think by themselves.
Human build robot to make life easier and more convenience. Robot can do some dangerous things which human can not do. Generally, more inteligent the robot is, more help it can bring. On the other hand, when robots are more clear than human, why should they listen to human. I think the Movie "I, robot" point out the issue which between human and rebot. In the beginning of this video2 , there are Three laws of Robotics which were wrote by Isaac Asimov in 1942. these are :

1. A robot may not injure a human being or, through inaction, allow a human being to come to harm.
2. A robot must obey orders given to it by human beings except where such orders would conflict with the First Law.
3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.

These laws shows hunman's ambivalent mind with the relationship bteween robot.