> We were promised something similar with Google Home et al but they are glorified light switches and timers in my home.

If only :-(

Ever since I switched them to Gemini, they're just crazy unreliable. For example, I have a routine to control multiple light switches at once. On some days, it happily executes the routine. In the remaining (about 50%) days, it says "I'm sorry - there is no routine called X. Would you like to run routine Y instead?" Why it can find routine Y but not X is beyond me.

So no, it can't even control smart devices any more.