As natural resources become more precious, they will become luxury.
For example in a cafe, water will be more expensive than other drinks as in some countries it is already costs more than coke. Besides that, as the world becomes a global society, in cafe there will be more choices for water. For example, they might sell different kinds of water from different origins. As the technology develops they also might serve waters that has functions(like vitamin water). Also indoor sports(like wii) will be more popular, and water sports like swimming will be considered as a luxurious thing.