On a recent stopover in Doha, Qatar, I saw the future of duty-free shopping. It’s the Orchard, a soaring new glass-walled terminal at Hamad International Airport that was part of the airport’s ...

Duty-free shops are usually found in airports, on cruise ships, and at border crossings — places you'd go or pass through while traveling. They're hailed as an excellent place to buy items tax-free, ...