If I have to go to a thing and push a button, I'd rather the button do the thing I wanted in the first place. Voice assistants are for when my hands are full or I don't want to get up. (I wrote more about my home automation philosophy in another comment[1]).

Also I have all my voice assistant devices mounted to the ceiling

1. https://news.ycombinator.com/item?id=47399909

The pebble index seems like the optimal form for this.

https://repebble.com/index

Could be pressed even if your hands were busy.

Time for a real life Star Trek comm badge

I'm in if I can embed it into my forearm

Rules out a bunch of cases where your hands are busy handling ingredients in the kitchen, etc