I do not think that machines could be smart enough to take over all of humanity, clearly that is the fictious part of the movie. I do think that this is a true cautionary tale for everyone. We keep making our devices smarter so that we do not have to think as much or use certain parts of our brains. However, we need to be aware of how technology focused our generation is becoming. I think this says that humanity is not careful enough, that we just keep pushing faster and with more force to the next best and biggest thing without considering the ramifciations.