I’ve never seen a solution like this. Facebook Paper allows for chat bubbles to be tossed around the window (if I remember correctly), but I haven’t seen any exploration in roughing productivity, which is what I would call this type of feature.
I’m not sure there is a valid use-case for this as the organized person has a pretty specific idea where they want an item, and the scattered user didn’t open the app. As a person who organizes in-app often I would want the developer to come up with better hierarchy or list traversing before I would start tossing things around.
In iOS there is an undo feature; To access the feature you need to shake the device. It seems harmless, but it’s a high threshold for the feature so, at least in my observations, it goes unused.
Imagine being in a meeting and you need to shake your phone.
This feature requires a physics-accurate gesture, which would look odd outside of gaming.
Also, when a user throws an item in many other apps, it is to close a full screen photo, hide a popup, or in the case of Google now and their email app, it’s used to discard. The gesture of toss is kinetically melding with that of the paper toss to a trash can or pushing the item off the desk and out of view.
On the other hand, it is an exciting development in UI.