https://www.reuters.com/article/us-amazon-com-smart-home/amazon-rolls-out-model-smart-homes-for-u-s-shoppers-to-try-out-alexa-idUSKBN1IA1ZZ >Amazon.com Inc on Wednesday said it has set up model "smart" homes across the United States for shoppers to experience what it's like for voice aide Alexa to dim the lights, turn on the TV or order more laundry detergent.