When you're lost, Siri can be your best friend. But if she can't retrieve the right address from your contacts, she can drive you crazy. And so it is with the legion of virtual personal assistants that are entering our lives. From Amazon's Alexa to Google's Home, people are busy talking to intelligent machines as never before. It's estimated that more than 60 percent of internet traffic is now generated by machine-to-machine, and person-to-machine, communication.

When you're lost, Siri can be your best friend. But if she can't retrieve the right address from your contacts, she can drive you crazy. And so it is with the legion of virtual personal assistants that are entering our lives. From Amazon's Alexa to Google's Home, people are busy talking to intelligent machines as never before. It's estimated that more than 60% of internet traffic is now generated by machine-to-machine, and person-to-machine, communication.