Yes, for now at least. Gemini can’t control devices so Google may do their thing and break this at any moment.
I’ve also had some challenges keeping it so the whole family can control the devices through voice. Occasionally (often enough that it’s a problem) it will say “I’m sorry, openHAB is off line” or some such for them while it works for me. We pretty much don’t control anything in the home automation by voice anymore as a result. YMMV.
Theoretically it should work but in my experience it’s followed the typical Google path of starting out working great and gradually degrading over the years until Google kills it for some shiny new thing. I’m just waiting for Google to kill it at this point when they swap out Google Assistant for Gemini.
However, all is not doom and gloom. Google has pre-released a new API that should allow OH direct access to devices connected to Google (and vise versa?). But it’s currently on a waitlist for access so we’ll see what it actually provides and whether we can use it (there might be a certification process required which could exclude a FOSS project like openHAB from offering it).
Since Google killed the cookbook feature we mainly use these now as media playing devices now.
Rich pretty much nailed it. I don’t have as many issues with voice commands, but am also cautious to what will happen with Gemini.
Just to clarify, are you looking for a touchscreen interface? If so, I wouldn’t recommend a Nest Hub even if I did trust Google to keep it working. Too much swiping and tapping, and you don’t have a lot of control over what it shows you.