I would be happy, if PSD obtains the feature a-la "Backup Configuration To File".
Backup should include everything, including plugins folders, stored queries (files with .sq extension), etc.
Saved file should then be valid in newer versions of application. Some sections, that are incompatible with the application, could be skipped during restore process, with warnings.
In short words, it would be wonderful, if we get backup/restore functionality, conceptually similar to the one, provided by MozBackup utility for Firefox browser.