At a recent developer’s conference, Apple announced that the new, IOS 6 operating system on the iPhones, will have turn-by-turn navigation, with SIRI integration. That will let drivers ask for directions or services without having to type.
Turn by turn navigation is available on Android systems. SIRI is already available on the iPhone4 and will be available this fall on the iPad3. On some cars the manufacturers have integrated SIRI into the steering wheel. IOS 6 will be available this fall.