No, this isn't an airport terminal, but the name of a themed mall. As the name suggests, the mall has an airport theme with different levels of the mall that resemble different international destinations. You could quite literally wander through accurately replicated streets of Tokyo, Paris, London and Istanbul in one day! The shops here are reasonably priced and offer mid-range quality designs.
In fact, the real International Airport is not too far away either, therefore, to accommodate the influx of visitors and keep them in a central location, there are many a hotel in Sukhumvit. There are also quite a few luxury residences available, like Chatrium Hotels & Residences.