For me, a guy who used to carry around a flip phone, a palm PDA, a DSLR, and an iPod, nearly everywhere I went, the greatest initial change was simply convergence:
The iPhone hasn’t just created new technologies – in expanding the definition of what a phone could be, it’s incorporated so many other devices we’d usually own. It’s a camera, it’s an iPod, it’s a portable video player – and you probably wouldn’t buy those things separately today.