Ars Technica: "The iPhone 4 is Apple's "biggest leap since the original iPhone," at least according to Steven P. Jobs speaking at the WWDC 2010 keynote. Indeed, in the three years since Apple first introduced the iPhone, the device has come quite far. At the same time, the basic concepts behind the iPhone have remained very consistent over the years. Despite regular modifications to the OS and yearly hardware upgrades, the iPhone 4 is very much a more modern, more capable version of that original device that made such a splash in the industry back in 2007.
We're not living with our heads in the sand: if you have come to hate the iPhone, walled gardens for developers, and everything Apple stands for, you will likely hate the iPhone 4, and there's nothing anyone can say to change your mind."