Most homes are relatively quiet and private compared to the typical company office. It takes only a little planning to know what resources you're going to need on the days you work at home, and to have them with you on those days. You can almost always have these conversations over the telephone. Also, more and more information is available over the Internet, or on computer disk, so it's very easy to access the resources you need from wherever you happen to be working. If people start working from home, they'll never come back to the office.
Most people enjoy the social interaction they experience in centralized offices.
So there's little danger of office buildings lying neglected and entirely empty any time soon. But there are good reasons to cut back on the vast troops that companies have been hiring to populate their centralized offices. But you probably can't have all of the people telecommuting all of the time. If some of our people start working from home, the rest of our workforce will feel slighted or mistreated. If this were true, it would tend to prove telecommuting is a good thing that more people want to do.