Recently while driving somewhere unfamiliar I made a wrong turn and wasn't sure how to recover. My new phone's search widget has a voice-input option, so on a whim I pulled the phone out and said "navigate to (location)", and it did the right thing: it correctly understood my speech, launched the navigator app, queued up my destination... and did not put the navigator app in "talk to me" mode.
So close, and yet so far. So I had to find a place to pull over so I could fiddle with the phone.
On the other hand, this is still way better than paper maps. :-)