Google Assistant now has APIs for handling Smart Doorbells, which then allows tighter integration such as allowing calls with the Nest Hub (versus the current just casting camera model).
It would be very cool if Home Assistant had support for supplying the doorbells connected to it (such as the Dahua ones) to Google Assistant as Smart Doorbells entities.
This would allow us to convert “dumb” doorbells into “smart” (which is how Google calls them) using HA.