At one point in time, J2ME (now Java ME) and WAP were the starting points for a discussion on mobile strategy and the web. Then, for a brief period of time, you talked about HTML/CSS. Now, for a growing majority of mobile strategies that don’t require a global presence on widely varying devices, the discussion begins with iPhone. Smart client is now iPhone app, and in many cases, the app is primary to the experience, not secondary to the browser. And iPad app may soon replace iPhone app as the starting point.
Frankly, as the adoption rate of iPhone increases and if iPad follows suit, it will become increasingly difficult to argue in favor of a starting point other than iPhone OS. The NPR iPad app, for one, provides a much more pleasant user experience than NPR.org.