What does it even mean? Let's say I buy a NTF $1000 and get a digital copy, what prevents me (barring legalities) to perfectly duplicate it and massively redistribute it (not the token, the distributed supposedly high quality file) for a fraction of $$$ and turn a profit (because since it had such a high price it must be in high demand)? The question is not about the legal consequences but about the thing you own: of you have one original painting you have only one, it's quite hard to exactly duplicate it for resale.
I may be naive (the dropbox-is-just-rsync kind) but I've yet to see a tangible explanation of a use† of CryptoArt/NFT that could not be done with `xxd -l 128 -p /dev/random` and PGP[0].
† No. "being in the blockchain" brings absolutely nothing (except burning watts). If the author wants to reissue anything he readily can. You. Just. Own. A. Number. I also hear some picture the author getting a cut of resales of the token, which is even more crazy when you manage to entertain the thought while trying to keep a straight face.