Then, they will fill it with as many sensors as they can do give you extra information. It will protect your home against burglars, survey your kids, prevent your cat to scratch the sofa, etc.
And with the camera, microphone, lidar and so on, people will happily let the little bugger record their entire life.
This will create the most reliable database about consumers including their money, interests, brand loyalty, level of education, people they meet, life rhythm, etc. This alone will make a lot of money.
Eventually, it will play contextual ads, in your home.
And of course, each one is an entry point for the Amazon domotic ecosystem, giving even more of your life to Amazon.