The Google Duplex appears to be a great breakthrough. But what happens if it's sold and deployed? More wealth to an already wealthy Google. Low income earners who can barely make it as a receptionist will be out of work. In the restaurant example, owners cut costs and possibly earn more -- which is great for these types of operators. But as someone who wants to schedule an appointment, my life doesn't change.
Google also just released auto complete and response emails. How does something like this change my life?
Any drastic change in AI is abstract and hypothetical, based more in science fiction than reality. In the 1940s, with advances in Nuclear research, it was thought that nuclear power for energy would change the world. 70 years later, we're still using over 80% fossil fuels. Not a great example, but I'll hold this line about 'AI' until I'm convinced otherwise.