To hear frequent flyers wax poetic about Singapore's Changi Airport, you would think that the airport itself was the destination. It has a rooftop pool, an orchid garden, a butterfly garden, a sunflower and light garden, a koi pond, a FREE movie theater, gaming centers, sports zones, a lounge area for sleeping, and SO much more. It is, quite simply, magical. Though it is not exactly "new," having first opened in 1981, Changi has certainly kept up with the Kardashians in the way it has adapted to modern tech and travel demands.
You'll never hear anyone talk about American airports in quite the same way.
Most of our airports date back to the middle of the 20th century, if not all the way back to before the Great Depression. Even as old terminals have been demolished and replaced with new buildings, the basic planning bones of these airports are 50+ years old, designed during a time of much lighter air travel (and even when they tried to plan for the future, they WAY undershot it) and on parcels of land that would soon be swallowed up by the ever-expanding cities around them. And then there is some just plain weirdness, like in Denver.