iPhone 2.1 software update will bring improvements to the GPS functions. Specifically, the iPhone will not only know where you are, but in which direction you are going and how fast you are moving. This is being interpreted by many people as the coming of turn-by-turn GPS," Charlie Sorrel blogs for Wired.
Proper turn-by-turn GPS would be a huge blow for existing satnav manufacturers," Sorrel writes.
What this update does show us is that... iPhone 2.0 has the ability to turn the world of mobile devices upside down," Sorrel writes. "Now that there are a 3G and a GPS chip inside, and now that the App Store is up and running, the iPhone can mimic pretty much any other class of handheld device with the simple addition of software." Via MacDailyNews .