Dropbox just released a beta update that improves the UI and some other features of the app. Their platform of choice for the beta update was the Nexus 7. Here's a brief summary of the changes:
- better video playback
- UI improvements
- app compatibility with direct presentation of files - (basically this is if you click on a file in Dropbox, the corresponding handler app on your device will open.)
Source: NexusTablets.net via https://forums.dropbox.com/topic.php?id=65903