https://www.cnet.com/news/facebook-portal-plus-vs-google-home-hub-vs-amazon-echo-show-touchscreen-smart-display-comparison/

There isn't a clearly defined recipe for success in the smart display category yet -- we haven't had a Nest or Echo Dot-type breakout that's really connected with the masses. That means that the companies making these smart displays are still trying to figure out how to sell people on this category -- and none of them are taking quite the same approach.

The cameras in Facebook's Portal smart displays will automatically follow you around the room during video calls.