The robot assistants we were promised as children are finally ready for the home. Well, sort of. Instead of walking, talking humanoid automatons like Rosie from The Jetsons and Robby the Robot from Lost in Space, our well-spoken helpers are housed in plastic and sit on tables. They answer our questions, control our homes and sometimes tell us a story. The most ubiquitous assistant so far has been Alexa, an Amazon-powered attendant that has made the jump from a $180 tower to the $50 Dot, which isn't muc
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