This is just a new version of the network share that many companies have had in place for years. The standard computer setup at a company might include for example a T: drive where all employees are told to store their files. Usually this was intended as a way to allow collaboration on documents, as well as IT not having to backup individual computers. The network share will usually have various levels of organization depending on who is working in any particular folders. Not saying it isn't a problem that could use solving, but it's not new to Dropbox.