I simply cannot agree, but again, it's a personal thing. I never ever find voice interfaces useful though...
Aside: When the presenter showed the demo of her asking Siri to figure out the airport arrival time and then gloat it "would have taken minutes" to do on her own... I sat there and just felt so so strongly that I don't want to optimize out every possible opportunity to think or work out a problem in my life for the sake of "keeping on top of my inbox".
I understand value of the tools. But I think overall nothing about them feels very worth showing even more menus for me to tick through to make the magic statistical model spit out the tone of words I want... when I could have just sat there and thought about my words and the actual, real, human person I'm talking to, and rephrase my email by hand.