Do any of those work with Siri? That's the big value for me. When the new Maps work it is pure magic (sorry for the iMeme but it really is).
-Looking straight ahead, grab phone and hold down Home button.
-Siri chirps
-"I need directions to foo"
-"Here are directions to foo"
-"In X miles turn Y on N"
The only time I touched the phone was to hold down the Home button. Never once looked away from the road. It's amazing.
A quick test on my Android phone (Desire HD running 4.1) shows that Google Now works the same way. Voice search always existed on Android, but it was certainly less polished around 2.2. Can't tell how it worked before as it never understood my accent, but then again, neither does Siri.
Edit: Two presses if you want audio instructions. Google Now opens maps which doesn't do audio instructions apparently rather than navigation which does. There's a button for navigation in the maps app.
-Looking straight ahead, grab phone and hold down Home button. -Siri chirps -"I need directions to foo" -"Here are directions to foo" -"In X miles turn Y on N"
The only time I touched the phone was to hold down the Home button. Never once looked away from the road. It's amazing.