Potentially, Minecraft servers could have used NFTs to grant 'ownership' (IE read-write permission) to areas of virtual terrain on a server, allowing people to trade 'unreal estate' outside of the bounds of the server on which it resides. That would have required the server to be aware of the walletID of each player, though, and have a plugin to allow ownership to be validated and update the access permissions. No different from now except that sale and transfer could happen independently of the server.
On the whole, though, it seems they are only being used to make tradeable things that have no impact on the game at all ...
Biting the hand that feeds IT
