Let's play 20 questions. Okay, fine, let's play three questions:
What does our limbic system want? If you said it wants to be happy, you're correct. What does our cortex want? If you said it wants to make our limbic system happy, you're correct again. What is the purpose of an iPad or an iPhone? Hmm...
If we view these ubiquitous gadgets of artificial intelligence as co-conspirators of our cortex, then the answer is easy: to make us happier. And we all want to be happier, don't we? Of course, we do. And the reason we want to be happier is that we are slaves to our limbic system.