The iPhone is the tip of the Iceberg
Intel’s 45nm roadmap reveals that procs with the power of desktop CPUs are on their way to the mobile platform. The fact is all the old concerns about mobile development are quickly becoming irrelevant. These things will have plenty of power to run any web app you can throw at them. The issue will become not one of “making things work” on the browser, but making apps that will be usable for mobile users.