When I can ask my smartphone "what time is the next bus arriving?" without having to touch it, that's when it's a really smart phone. I hope it's that level of a kick.
A family member tried it on an original Droid, and it was a miserable failure for her. I was a bit mystified, comparing this experience with the positive comments I'd read. Might be her voice in particular; I turned on the "personalized tuning" setting, but it did no good.