It seems like Gates has set a very high philanthropic bar for a tech leader. Has he redefined the role of a tech-industry CEO? Bezos has no philanthropic reputation, despite some good work, but Apple's brand seems to require some public good on an ongoing basis—certainly more than Microsoft. Now, of course, a current CEO has a very different breadth of responsibilities than someone like Gates. But, still, he seems to have put the public-good on tech's agenda in a way it wasn't done before, and if it's motivating for Cook, that's a win-win for everyone, right?