Google, Lagging Amazon, Races Across the Threshold Into the Home

When Amazon introduced its Echo device in late 2014, Google executives were caught off guard. For years, they had predicted the creation of a virtual assistant that would answer questions or help accomplish tasks, and they focused on building that capability into smartphones and tablets. Amazon took a different approach and created the Echo, a device with the sole purpose of showcasing the company's artificially intelligent assistant software, called Alexa. Since then, the Echo has become a surprise hit, vaulting Amazon ahead of Google in a race to build technology that interacts as humans do. Users can ask Alexa to play music, dim the lights or call for a ride.