I imagine it could actually develop into a similar situation for physical art. There is an original work that is worth a lot because humans are weird like that,

I imagine it could actually develop into a similar situation for physical art. There is an original work that is worth a lot because humans are weird like that, and an entire industry of experts who try to sort out the actual original NFT that was minted by the artist over the duplicates and fakes. For example, we know the original creator of Nyan Cat came out of the woodwork to retroactively mint an NFT for it, https://foundation.app/@NyanCat/nyan-cat-219 https://foundation.app/@NyanCat/nyan-cat-219, which sold for 300 ETH. Obviously, anyone can create an NFT with the same gif, but we are reasonably certain that the actual created this ONE and declared it be the original. Obviously, this is a very odd thing to try to wrap your head around, but is it really that different from valuing original physical artwork?