At the Dropbox Developers conference, Dropbox announced a new API.

Dropbox’s new Datastore API will allow users to store and sync any kind of application data — that includes game states, contacts and to-do lists.

So when you make your to-do list on your iPad while commuting on the train, and then open your computer at home, it will be synced with all your Dropbox-enabled apps on that device.

This should really help accelerate Dropbox usage. On the HTC One, the HTC Backup service actually uses Dropbox to backup the phone already apart from auto uploading photos.

This is another great offering from Dropbox.