Consumers have moved up to products that they perceive as being higher quality.
It is a rapidly changing beverage landscape and it is important for Coke to move quickly to deliver on what the consumer wants. The competition for shelf space is intense.
They were the first to recognize that the consumer was moving to noncarbonated products, and they innovated aggressively.
There's a lot of innovation around products that fall under the umbrella of 'good for you'. Increasingly that's the direction the consumer is moving.