Chatbots have come a long way over the last decade and are now often found in households through Amazon Echo and Google Home. Technologically, they have improved in leaps and bounds, with improvements in AI and machine learning resulting in better language understanding as well as voice-to-text that power the Echo and Google Home devices.
I expect that the growth of chatbots will continue and we'll start seeing them used in a huge range of application and through a wide range of devices. As they improve, they'll be trusted with increasingly complex and important tasks and will completely revolutionize a lot of industries. Industries such as customer services are already changing, with chatbots on multiple banking and retail websites and phone systems.