Is Hydroponics the solution to the impending global fresh water crisis?

It is thought  the next generation wars will be fought over water, which countries are rapidly running out of. However the bulk of fresh water is used in irrigation where technologies remain outdated. 

It takes 11,000 liters to water to produce one kilo of rice using the traditional flood irrigation methods. The same output of rice can be obtained with just 4 liters of water using hydroponics techniques where nutients are directly applied to plant roots. This illustrates the utter wastefulness of present day water consumption habits and indicates an alternate to water use. But want know from the experts that what they think about this? Is Hydroponics the solution to the impending global fresh water crisis?