There is no such thing as a “useful NFT”.
Read Torgue’s & Richy’s comments on that, again.
I wouldn't go so far as to say that there couldn't be a 'useful' NFT, just that as when I saw Vitalik talking about smart contracts back in chicago many years ago, I think the potential use cases are a lot narrower than is being hyped. (The whole "buying hashes of pictures you don't own" is obviously complete BS though, of course).
I have no doubt that NFTs will be a big deal component of the Metaverse, or any other VR world coming soon.
Once they have convinced the pleebs that "owning" something in Metaverse has supposed value, that's all she wrote. They'll all be clamoring for it.
Hell, I could even see them creating a secondary stonk market that trades stonks of virtual companies. Probably somehow using the Ethereum blockchain.
If I can sit here and dream up the absurd and insane, then I'm sure the scammers are already cooking it up as we speak and salivating.