Anything that doesn't require you to submit to centralized storage under third party control (euphemistically known as "the cloud") has a shot at dethroning Dropbox.

Especially outside the US, where people, governments and businesses are becoming increasingly weary of having their data stored where US government agencies can get access with little to no legal process.

When companies start using "not stored in the US" as a selling point for their services you have a serious problem.