Idea: Robotic personal assistant
A robotic dog that follows you around, has an optional programmed personality that is programmed according to the owner's needs, and most importantly, has storage space to avoid strain on muscles of the owner.
Depending on the owner, and the type of items, the 'robo-dog' could either throw items to a target from the dog's storage space, including the user's hands, or even a mouth for food.
For delicate items, the item could be lifted via a extendable/collapsable pole so that the item does not get damaged.
GPS co-ordinates could allow the dog to perform deliveries with facial photo recognition combined with PINs or passwords to ensure the delivered item gets to it's proper destination.