It will be wondeful if this feature is added as I see some other providers implementing already.
I will be nice if the visual mechandizer could not only allocated products to categories dynamically  but 

1. also dynamically create categories if no category is found. 
2. disable the categories when no product is found (to prevent 404 page errors, it should create a url redirect to the parent category or previous category, or to the homepage if not parent category is found).

3. Enable the category if new products are added.

Cheers