Amazon plans to bring a home robot to market as early as 2019. Codenamed "Vesta," after the Roman goddess of home and family, the project is several years old, but hiring for it recently has ramped up with an eye toward placing prototypes in employees' homes by the end of the year, according to a report. The robot could be a mobile smart speaker. Some versions of the product apparently have cameras and computer vision software that allow them to travel through a home like a self-driving car.