I don't know if I want to talk to my watch. I don't even like to talk to my phone. But if you're going to...
If you think about it, a watch makes more sense for Siri-type technology than a smartphone does. With a smartphone, it’s still very easy to type commands. Many people avoid talking to their phones when they’re not on a call so they don’t look like asshats who are talking to their phones.
From techcrunch.com
