A command that would dump out everything in your inventory onto the ground would be very useful. It would make it more convenient to move large numbers of things that you don't intend to keep in your inventory to and from the pocket dimension, and it would make it easier to test custom items in debug mode, as you wouldn't have to manually empty your inventory to make the "I" command usable again if the item you were trying to spawn didn't appear .
The heck? But yeah, I like the idea too (though I don't see them implementing it in the nearby future).
