Though it was a factor -- it's real success was that it was OS X in a tiny phone -- basically a portable Mac with totally wireless connectivity. For many applic

Though it was a factor -- it's real success was that it was OS X in a tiny phone -- basically a portable Mac with totally wireless connectivity. For many applications you could simply leave your laptop at home and walk on the bus and go on with your day. Steve Jobs even said at its launch that the iPhone rans OS X and ran "desktop class applications". This with it's multi-touch full screen keyboard and GUI integration meant that people could interact with it much more naturally than any phone in the past. Even my mother could use it, which is remarkable, considering how many cell phones I gave her that she couldn't use. I guarantee you that the most used features from day one of the iPhone launch were: Safari, Google Maps, and YouTube, with the Music app being simple a "nice to have".