In case it wasn’t obvious before Wednesday, Amazon.com has leapfrogged the smartphone to go after the next era of computing. The company never could have done this if it hadn’t been steamrolled in smartphones first. The way
Amazon.com has debuted a new high-end version of its Echo speaker with a smart-home hub system built in, stepping up a fight with Google and Apple for digital control of people’s homes. The upgraded device, called the Echo Plus
