Ask HN: bad idea? Turn Dropbox folders into projects

I'd love to hear thoughts on this idea for a YAPMA (yet another project management app). Assumption: people manage projects mostly through dropbox (for files) and email (for communication). Why does projectmanagementappX make me upload files? Solution: a project management app that turns your Dropbox folders into project management (adds structure and features to it, people, dates, todo's, whatever). In my mind this is a web app, but it starts with your Dropbox and you never have to change how you work (put files in Dropbox). Initial core audience: designers. Thoughts?