As you said, you can pass physical property, why would you need that to be extended to other area on top of it ? I mean you would think that inheriting the actual capital generated by the art pieces, on top of the unsold original pieces, would be enough as far as money goes (moral right is different, I see why you would want to inherit that). It's a bit as if I were able to claim a salary for my dead relatives because, you know, I used to live off of that...