Someone hasn't flown in a while
You can already take unlimited liquids onboard from duty free (within your importation limits) - it's liquids from outside the security zone that the regulations apply to.
If anything duty free shops have profited massively from the liquid restrictions since unless you have checked luggage you have to re-purchase contact solution / water / gin / deodorant from them once security have taken yours away.
Biting the hand that feeds IT
