I use an iPad Mini as a central control panel. It’s also the only device I install the third party home apps on.Now that most of my light bulbs are connected, and my ACs are connected, I'm sort of out of ideas of stuff I could possibly want automated. (One notable exception being my coffee maker, which sadly has a "soft" switch that has to be physically pressed. But not the end of the world.)
Anyway, what I truly need now is a dedicated central dashboard device or screen or something that is simple enough that a guest or my 6 year-old can use it. Some really nice and intuitive visual interface so you can see in one view everything that's going on. Maybe a dedicated iPad? In a perfect world it would be an always-on e-ink kind of thing I could put on a wall or something.
While I do have HomePods, Siri is dumb as ****, and even if it wasn't, you still have to know the names of scenes and devices to make stuff work.
I used to use an iPod touch as the remote, but they’re too far obsolete now.