NEW YORK (AP, Oct. 5, 2016) — Does your home really need a "smart speaker" that can answer questions, call you an Uber, turn off the lights or play music when you ask? You may be about to find out.

Two years ago, Amazon introduced the Amazon Echo, an unassuming, $180 cylinder that sits atop a kitchen counter or bookshelf, acting as a personal assistant that listens to you and does your bidding. Initially, the gadget's main purpose was a little difficult to discern . But Echo and its Alexa voice recognition software have since become a sleeper hit, with an estimated 3 million gadgets sold as of...