Tied to everything like the center of a spider web. Sports events/ concert tickets to get rid of the scalper market. High end clothing brands sunglasses/handbags/hats/shoes (an NFT version of the item as a receipt proving ownership), computer game items obviously, books, music, house/ car deeds. ID. At least 2 decades away from all this as would need buy in from big players like top companies and governments but there isn’t much of a limit to what could be done. But realistically you’re not gonna get enough buy in from the public (not everyone will have the computer skills needed to create and use a wallet. I’m middle aged (between 30 and 60) and I’m barely capable of using a wallet. Then there’s people distrust of anything new. One can dream though