Some derpy nerd will pay more than 1 bitcoin for 1 bitcoin. Why? Who knows. 1 bitcoin is worth 1 bitcoin, if you pay anything more you are throwing away money.
I have some Canadian pennies for sale if anyone would like to buy them for 2 cents each! Lol!
Quite true there really is no difference between a newly minted coin and a regular coin otherwise Bitcoin would not have fungibility.
It would be more along the lines of showing off than anything else and saying that some coins are tainted and wanting to own newly minted ones to keep a form of transaction purity.
(I guess from that point of view though one day old Canadian pennies will become collectible so Bitcoins first minted in 2009-2010 may become a niche market if they are held and stored and sold as a package like random satoshi coins)
Only way I see this logic being revived is if they go back to Casascius coins.