This is exactly why Siri is important. It is context aware and stays out of your way until you need it. I am very bullish on voice-driven apps of all kinds.
I think Siri is important in a variety of ways, but voice driven apps in the traditional model (a la Siri) aren't how I perceive the future of interfaces to be.
You wouldn't use Siri on a date, or in public would you? There are just some important issues that are raised by Siri that a lot of people sort of neglect. I don't think voice apps will be successful in a broad, paradigm shifting way. But, they will have their niche and there will be some fundamental princples that are learned.
Voice driven apps like Siri are one step away from being thought-driven apps, though. Full conscience interfacing is still a pipe dream, but word recognition from brain patterns already has proofs of concept.
I definitely agree, and I do think Siri and the like are very important steps to get there. I just don't think in the short term (relative short term) that these apps can gain enough traction in the wide scope that is championed by some of the proponents for voice apps.
You wouldn't use Siri on a date, or in public would you? There are just some important issues that are raised by Siri that a lot of people sort of neglect. I don't think voice apps will be successful in a broad, paradigm shifting way. But, they will have their niche and there will be some fundamental princples that are learned.