People use various kinds of machines. Bionics & robotics can enhance the quality of life for some people.
Some robots will appear to be more human like, while others more alien like.
http://www.bbc.com/future/story/20131220-all-hail-googles-robot-army
The_Stepford_Wives depicts people gradually being replaced with humanoid robots. An AI copy or a synthetic duplicate.
http://www.bbc.com/future/columns/future-thinking
In contrast, Invasion_of_the_Body_Snatchers is about ET consciousness adapting to various worlds by making a copy of the life-forms they wish to inhabit.
