In addition to having just the folder sharing, there is also the added side benefit of better security. The folder sharing functionality supports individual file permissions for documents inside, making it trivial to change permissions on a batch of files. Other additions to Google Docs today include progress meters for files when uploading batches.
All of this goes back to Google attempting to offer a full cloud-computing environment, regardless of context. Not everyone needs servers in the cloud, but almost everyone could use office environments in the cloud -- or least Google hopes so.