Best thing I can think of is to verify licenses for digital products/games. Buy a game, verify you own it like you would with a CD using an NFT, and then you can sell it again when you're done.

You could do that today without NFTs or anything blockchainish if the game companies wanted it. The hurdle isn't technological, it's monetary. There's no reason that a game company would want to allow you to resell your game.