One of the undocumented features in PS Vita firmware v1.80 is PlayStation Mobile transfers – the feature that allows you to transfer PlayStation Mobile content to and from your PS3 or PC/Mac. The PlayStation Mobile service will be launching this Autumn, so firmware 1.80 adds compatibility for the service.
Until now, the only way to transfer PSM content to your Vita was using the PlayStation Mobile SDK and a PC. The new feature means gamers will be able to transfer / backup content to their PS3, and eventually download content to their PS3 from the PlayStation Mobile store.
Sony at it again! Withholding vital information from their consumers! /s