However, we use them in very different ways. My time is spent in a creation state. Programming or preparing tax returns I'm creating products, so my monitors reflect this. Email is hidden and only checked at certain times of the day. Each monitor has it's purpose so that I don't have to switch between programs very often (although Vista's Win+Tab is pure eye candy!).
Bill is at this stage of his career, a email guy. He's managing ideas and resources. Email on one screen. New message on another. Third screen for browsing.
More on the maker/manager difference in an upcoming post.