Okay, probably you're not saving the world, but you save electricity and you can operate this this where no power outlet is available or a regular washing machine is allowed.You power it with your foot. Really. And at least your laundry is getting clean. Not bad.
I can imagine a variety of use cases. A gazebo or small hut not connected with a power grid to quickly clean BBQ-Sauce spilled shirts :). Your mobile home on tour or in a house tent when you are abroad for some weeks. Or just to save energy in single households.
Some great innovations might not be so spectacular that a new phone, but they are not less important.
