Looks like Google Assistant on the Pixel is finally getting proper home functionality, without having to have Google Home. Up until now you could issue commands to the Nest, for instance, from your phone if you had already set it up on the Home. For instance, I already have a few Hue lights and a couple of Wemo devices (only one switch) that I have set up through Google Home. Now though you can do it through assistant, which is awesome.
If you open Assistant and go into the settings, Home control should be there. Since I already have a few devices set up through my home these already appear for me but you can add devices from Nest, Hue, SmartThings, Honeywell, and WeMo, create rooms, and assign a device to each room. Not too bad. Unfortunately Homeseer is not in the list but they are working on it and hopefully will be there shortly. Currently I’m using a workaround with Tasker and Autovoice to coomunicate with Homeseer, as well as IFTTT although that’s a lot slower than HS with the Tasker plugin.
Not everyone is seeing it yet apparently. I have a Google Pixel XL running the Android 7.1.2 beta, with the Google app 6.12.19 and Play Services 10.2.98