Apple chief executive officer Steve Jobs did one of his trademark keynote speeches, filled with ultra-cool photos and an interactive demo with the new device, as well as celebrity walk-ons from Google CEO Eric Schmidt and Yahoo co-founder Jerry Yang.

All of the gee-whiz adoration from Apple fans and gizmo-lovers aside, the key question is: Will the company's newest venture disrupt the cellphone industry in the same way the iPod disrupted the digital music market?
At first glance, the answer seems to be yes. The main differentiating factor for Apple is not necessarily the functionality of the new device, but the design and usability -- in other words, not so much what the iPhone does as how it does it.