I see two things driving bandwidth demand in the business sector: VPNs and videoconferencing.
We talked to a large corporation that has a plan to move 20% of its workforce to the home--an option its wants to make to employees as work life quality issue (e.g. young children to take care of, time shifted work hours, etc.). They want a 50 meg, symmetric, low latency connection between every home based worker and the corporate network. Their math for that amount of bandwidth was simple. They intended to put an HD video camera and large screen monitor on every home-based worker's desk to support ubiquitous and convenient videoconferencing with supervisors and co-workers, and they wanted to support minimum of four people on a call simultaneously, meaning 8-10 Meg x four video streams, or as much as 40 meg just to stay connected.
I was in a branch office of a software firm with an interesting set up. They had two very high resolution HD cameras and two very large HD monitors with four large easy chairs facing the equipment. An identical set up was in the main office. They left all four cameras running 10-12 hours a day so that there was a full time HD video connection between both locations, and so it was very easy to have casual and spontaneous conversations with folks in either location. Both offices had affordable fiber connections, so they could "waste" the 40 to 50 meg of bandwidth that these four cameras used continuously for ten hours a day. But this becomes easy AND useful when you have an affordable Gigabit symmetric connection.
Communities that want to attract (or retain) companies using bandwidth this way need to be building a "Gigabit City," and doing it now.