In a world with higher energy cost and more frequent water restrictions ornamental pond design needs to change. Ponds designed so they have to be topped off to maintain aesthetics require more water than a similar size lawn or vegetable garden. Ponds designed where large pumps have to run continuously use quite a bit of energy. Neither of these features will suit a certain clientele in the future. These environmentally conscious consumers might be interested in water features that could double as rainwater storage and fluctuate in depth to comply with water restrictions without compromising aesthetics. But those criteria are not the best practices of the current water gardening industry. I’m not sure how to make these clients happy, but there will be opportunity.
These clientele will be born after 1962. The first earth day occured before they were ten years old. 10 years old is the time when people look around and say "This is what the world is like". Everybody wasn't affected by the environmental movement but the ones that were have a totally different mind set than people born a few years before 1962.