assuming you trust the issuer (contract, in blockchain) there is a public and verifiable record of your ownership of an individual item

paired with signing messages to prove your blockchain identity, you can prove to others your identity and assets in your control

think if the contract was for movies from hbo, and by logging in you can view and download movies you own nfts of.. this is obviously not the case today, but may help highlight what the future may look like. you can of course think of and read about similar use cases for assets we ‘own’ today.

a lot of the push in blockchain is for decentralizing authority and democratizing access, where the above example is only solving the former