Smart speakers have invaded so many American homes that it's hard to believe the Amazon Echo ($99) was launched less than three years ago. That said, Amazon has since expanded its Echo universe with the scaled-down Dot ($49), the scaled-up Spot ($129) and the whoop-de-do Show ($229). Now, there's the Fire TV Cube ($120). We've tried them all, but this one takes the prize. After an easy-as-pie setup, the Cube acts like the Echo, but it can also control your cable and satellite boxes, your TV's sound bar or speakers, your remote controls and all of your favorite media, plus, via its "smart home skills," it can even control your video doorbell, lights and thermostat.