Yes but you can load up on booze, perfume, chocolate, iPads, noise cancelling headphones and tons of other stuff.
They're not even cheaper than normal shops - more expensive than Amazon. What's the point?
This then makes you more likely to later buy an Armani t-shirt for $80.
The store in the airport is there to make you think the brand is glamorous, to convince you of its mystique, not to sell things.