Voice input just isn't ready. Commands, yes. Anything longer than a short sentence and it's unusable. That means this will forever be a Second device, either

Voice input just isn't ready. Commands, yes. Anything longer than a short sentence and it's unusable. That means this will forever be a Second device, either separate or connected to your smartphone. Working speech recognition would be a major revolution, so would useful Augmented Reality, and so would combining them in a lightweight wearable mobile device... but none of these exist. Big jumps in technology don't happen like that, and certainly not all at once at one company.