The stage of this movie is 2019 and in now 2015, there cannot be technical development and the environmental aggravation as this movie.

I think this story has many aspects. Humans treat slave badly, Deterioration of the environment through the development and so on.

There are many stories which robots with feelings becomes a human threat. In fact, new robots have been developed and it may be no longer that they have feelings.

It was hard for me to understand so I want to watch it again.