The world needs a new source of energy, an unspillable source.

What are some futuristic uses of hydroelectric power?

I know that we use it now for powering homes, factories, etc. And I know that we will probably use it even more in the future. But I am wondering if there are any cool, unique, and specific concept designs (things thats people have already thought of and I can find information on) i.e. a hydroelectric car or a hydroelectric house.