Matt Birchler:

Meanwhile, a stationary voice assistant is always in the same place and is always ready to respond to requests. There is no extra thought that needs to go into a request like this, you just ask away. It’s easy.

This is exactly why I prefer the Echo-on-a-shelf to Siri-on-a-device in every case except when I’m not at home. I just ask a question and get an answer.