For the moment, these machines remain at the dawn of their potential, as likely to botch your request as they are to fulfill it. But as smart-speaker sales soar, computing power is also expanding exponentially. Within our lifetimes, these devices will likely become much more adroit conversationalists. By the time they do, they will have fully insinuated themselves into our lives. With their perfect cloud-based memories, they will be omniscient; with their occupation of our most intimate spaces, they’ll be omnipresent. And with their eerie ability to elicit confessions, they could acquire a remarkable power over our emotional lives. What will that be like?