While it is a wonderful feature, people will not use it that much. In my office, I am not going to be jabbering to my phone with people around me. It is intrusive and annoying in open plan spaces. Yes it is fine if you have your own office. But most people don't. Same goes for using it on the train. Other people don't want to hear me open my email. I can definitely say that in Japan it will be the most superfluous feature ever devised. People don't even answer the phone to speak to people in public, let alone tell their phone to give them a calendar update. It sounds good on paper, and as pointed out in the article, it's been around for a while unused. People won't use it as it is intrusive to those around them and draws attention to what we are doing, unless you are one of those people who want to do that. Kinda like someone who walks around with a blue tooth attached all the time. You just end up looking like a bit of a douche.