As someone "in the know" in the beginning of the app launch its purpose is to be able to locate items in the parks and dtd and resort gift shops so that you can know exactly where to go to get it or you can have the item shipped to your home(for a fee). At a later time you will be able to have...
The app is very cool and has lots of neat features such the product locator and the ability to ship larger items home that might not fit in luggage.
At this time though it doesn't give the option to send purchases to your WDW resort if you're staying property or have items waiting for you at...