You brought technology closer to people
You've built a company. Twice. Apple computers were always known for being the most user-friendly. Others copied and followed.
Before you created iPhone, smartphones together with communicators were considered "geeky" devices, which only nerds and CEOs would use. Now my mom has a smartphone, too.
Without you world would not be the same - computer interfaces would be more complex, less people would use them, and IT guys would be less respected.
Even Android (archived copy) would be different!
Also, your presentations (archived copy) were great!