Amazon's Fire TV Cube gives Alexa control of your entertainment system

Amazon's Fire TV Cube comes with a remote control but the idea is to mostly use your voice. "Welcome back," comes the reply. And with that, Amazon's obedient assistant turns on your television, sound bar and the lights in the room, without you having to fumble with a remote control. That's one of the scenarios you might set up with the aptly named, hands-free 4K Fire TV Cube media player that Amazon starts taking preorders on today for Prime members and that I got to preview a few days in advance. Amazon has already carved out a spot in many living rooms with its Fire TV set-top boxes and streaming sticks--without divulging numbers, Amazon claims it has sold the most video streaming devices by units.