The first one that really stood out to me the last time I was at this airport was a vending machine with fresh food in it. It had a variety of fresh meals including salads, noodle dishes, and more.
To paraphrase a wise hitman, they have the same kind of stuff in Singapore that they have over here. There are, however, little differences. For example, in Singapore you can walk into a 7-Eleven and buy a serving of mashed potatoes — from a vending machine.