We have had machines at home for decades, why is there now an urgent need to talk about these issues?
Because until very recently the devices had to be set by us to do something on our behalf: an alarm clock, a washing machine, a toaster. Now, with the very recent developments in machine learning, they think for us: they detect data (temperature, presence, etc.) and react autonomously, set by someone. In fact, they judge our present. Think about when you want to write something and the corrector changes the word you are using: it does so because it prefers the dominant term, which may not be the one you would have chosen.