Comment by skore

Since dropbox knows which files are being worked on, I don't actually think it needs to be inside of the application, it could just as well be a standalone overlay. The "sneek peak" screenshot does indeed look like an overlay that pops up when you open a file and which tracks the collaborative status. It also seems like it adds messenging functionality, which I must admit looks neat - pointed messenging functionality tends to be a lot more productive than general purpose messenging.