Man wants to introduce sentience into machines so that they could solve problems more efficiently for him, by having a thought process of their own. Man however, might wonder that maybe it is the very purpose his kind was created for by a higher power. Afterall, he himself is sentient and has a thought process too. So paranoid we are, making movies about how artificial intelligence might take over humankind, but in the end would they be any different than us? No, just better functioning.