I'm still lost.
Maybe I'm old fashioned, but I don't want to talk to my tech.
In my mind, that killed Google Glass. It will kill any tech which primarily interacts by voice. The social awkwardness of having to talk out loud when in public, especially when quickly trying to find a bit of info ("who is that actress?"; "what is 23C in F?"; "Buy 4 boxes of plasters and check my bank account") which will make people around you curious about what you're doing - just no.
So, although there may be a small niche where these things might be useful, I can't ever see them becoming a major way to interact with technology.