Someone could make an app that only shows a QR code for NFTs you own. Someone else could make an app that shows QR codes for NFTs they don't own.
I suppose your right that it usually wouldn't matter, but in case of conflict you better be prepared to sign something with your private key. If NFTs make most of society familiar with public and private keys, message signing, etc, it will be a win.
A QR code is a number too and not a very large one. Small enough I think to fit on-chain in the tokenURI field of an ERC721 contract. Not eve need of ipfs or arweave to store an image.
Yep, if someone else tries to access with your ticket you can always sign with your wallet somewhere to resolve the conflict.
We will probably see crypto wallets integrated in our phones and associated OSs pretty soon to make everything smooth.
I suppose your right that it usually wouldn't matter, but in case of conflict you better be prepared to sign something with your private key. If NFTs make most of society familiar with public and private keys, message signing, etc, it will be a win.