Offices Buildings - a thing of the past?

Do we need office buildings anymore? As data services from T1 or DS1 to GigE continue to become more prevalent in the network the pricing of these advance data services will continue to drop. So what good is an office anymore? Do we need physical interaction? I often Instant Message people in the cubes adjacent to mine instead of talking. We just starting to see 100 Gigabit Ethernet Service tested in the Network. We can only imagine the possibilities of the applications that will be coming down the pipe to use that bandwidth. It could be entire new conferencing application to see and speak to coworkers as easily and quickly as we use instant messaging services now. Consider how much fuel could be saved if the majority of the work force worked from home, not to mention the benefits to the environment. Productivity and Accessibility are always questions when people want to want work from home. I believe given enough bandwidth and the right applications it will be nearly seamless to determine if a person is home or at the office.