Samsung's new S8 smartphone is powered by Bixby, its AI assistant. Launched at the press of a button, Bixby allows users to control apps by voice-command. Samsung promises Bixby will do with voice almost everything that can be done by tap or swipe on your phone. However, Bixby faces stiff competition from Google Assistant and Apple Siri. How quickly third-party app developers integrate Bixby into their products will ultimately determine how successful Samsung’s AI agent can become.