Indeed, if it can't be tied to a physical object, then there is no way to prevent two completely independent markets from developing for the object and its associated NFT. People could buy NFT's with no interest in getting a counterfeit, but simply selling it to someone else at a later date.

Granted this is strictly a hypothetical for me since I don't buy luxury items. My most luxurious possession is a musical instrument that I love dearly, but that is in fact fairly generic, and its value is based solely on its quality. But supposing I bought a laptop computer and it came with an NFT, my first impulse would be to sell the NFT as soon as possible, treating it like a rebate card.