Creative Cloud does have an automatic file sync currently but it is only active for a specific folder. It would be extremely helpful to backup project files across all applications (not just Premiere) to the cloud automatically, regardless of their local disk location. Even though the auto-save helps prevent me from losing too much work, there have been times where I did not backup my hard drive and it failed and I lost the project file. If it was in the cloud as well I would have been saved.