Actually no; Dropbox and version control are different ends of the same problem spectrum. Using Dropbox for version control is non-optimal, and Dropbox VC is more backend/invisible to it's use case.

Dropbox is about syncing, as fast as possible and in real time - it is designed for multiple computers but only one concurrent use. So it is really for the individual. Versioning is a form of snap shot that is designed to allow multiple concurrent work (and has benefits for deployment, releases, bug tracking etc.)

The vision should be to see them working together IMO :)