Someone can use it to have a really ironclad DRM implementation, guarding the art you saved and to make sure only its approved owner can view it (mimicking the tyranny of physical scarcity of meatspace for cyberspace goods).

The reason you saved it and can view it is that nobody's doing that yet. And because there are way easier and cheaper ways to implement DRM than Solar System-sized mechs, nobody probably ever will use NFTs for that. : p