[HCI] emotion of robot

Why people would like to make the emotional robot (movie)?

First, I want to talk about the word 'robot'. It came from the Czech writer,Karel Čapek, that mean 'work' in there language. That shown, people want the robot to work for them. Most technology almost from the fiction or movie and most of the robot movies make the robot have the emotion. Why?

For my opinion, if people want the robot work for them, they should want the robot can response them immediately. So emotion is one of the best answer for this solution. People want to communicate with robot directly. Some people dream about living with robot, so a lot of movies show the robot can do a lot like human.

For example, the robot movies that can act like human is 'Bicentennial Man' (by Isaac Asimov). It's about the common house android that have an accident that make him can think like human. That show a lot of impossible act in robot like angry, love, like including want to be the normally human although lost the immortal of the robotic. (O_o) But it still have the smooth career out of the "Three raw of Robotic". That's pretty cool, I mean, when I looking for more information of this movie, it rarely show the negative comment of this movie.