Ray Kurzweil expresses it beautifully:
The story of Steve Jobs is an amazing one. He turned a few hundred dollars of spare parts into one of the most valuable companies in the world while revolutionizing one industry after another. In so doing, he was a prime example of the empowerment of the individual while in turn empowering everyone else. He showed the power of marrying science and art and democratized the tools of creativity. Jobs was truly a unique and remarkable innovator who has enriched all of our lives and we are all immeasurably saddened at his passing.