In his speech to a college, he knew that he was going to die, an he based the speech on that. He believed that he was going to die around that period of the speech, but was still alive until 7 years later: when he just recently died. He left an innovative way to use everyday objects: The computer, the mouse, the laptop, the mp3 player and the phone. We can now carry a whole computer in our pocket. That's what he left behind.