Please add support for people creating and using Fusion 360 files that only exist on the local system, and are never transmitted to the cloud (for any reason).
The present situation (Cloud only) excludes everyone who works on confidential (for any reason) designs.
For them to use Fusion 360 means they need to learn and use two tools (eg Solidworks + Fusion 360, Rhino + Fusion 360, etc). At a guess :), most people won't bother, and will just keep using/investing in their current tools (eg Solidworks, Rhino, whatever).
Adding support for "local only" files should allow these people to then use Fusion 360, potentially moving to it as their primary platform.
Note - This "idea" seems to have been skirted around before (eg http://forums.autodesk.com/t5/fusion-360-ideastation-request-a/cloud-and-online-work/idi-p/4652787), but not directly requested.