But now imagine if 10 different AAA game studios realize that they can create a market in which people instead of paying $5 for a hat or $1 for a loot box with 10% chance of finding a hat-they pay $100 for a hat NFT and $10 of that is a transaction fee to the studio. They pay $100 for it, because a) it will work across games and b) it might be worth $10k tomorrow. The studios can take a cut on each transfer, instead of just one fee! So these studios just scaled up their hat business a lot and all they had to do was agree to honor the hat ledger which says that only the hat's rightful owners can wear the hats.
There is obviously no problem moving the hats between different games (A purely cosmetic thing is pretty easy to implement).
The fact that the honoring of the NFTs is still voluntary from the studios, that it's just as centralized as ever, and that it might disappear the day the studios no longer make money from this is of course lost on the hat buyers. The tokens are extremely fungible.