I pressed 'h', and it didn't do anything.
Context matters with such shortcuts. Even if I make sure that I have the location bar selected, focused and clear, 'h enter' takes me to a completely different website - because hacker news is actually 'news.ycombinator.com', so it's not the default by typing'ctrl-k h enter'.
And let's be frank. Even if we do get voice control, it's not going to somehow take our keyboards and mice away from us.