The iPhone sparked a software design revolution. I think the most important change is that software evolved from compulsory to serving. This is a big change that is completely changing the software industry. Software used to be about how it would automate a process. Now it is about empowering the individual.
The iPhone (and the apps it is running) itself is a child of the maturing of the field of interaction and user experience design. It was just the accelerator.
Last week I talked to a software company existing for 25 years that only recently hired their first user experience designer. Why? They never had to. Software was always about the proces, and they are the best in their field. What changed is that software now is about the people using it. We want to be in control instead of a computer telling us what we can and can’t do.
This shift is fundamental, maybe even disruptive.