There's nothing wrong with the benefit but it's the means that concern me. Ideas that are worthwhile usually indicate a reasonable method for attaining the ends required. I see nothing of that here. It's equal to saying let's make wishes come true. How do you do it?

Quartz crystal windows that change from light to dark when a charge is added. I'm surprised this hasn't been done yet, considering the small amount of glass affected. They already do this in high-tech houses.

Why not make the car windows just like glasses that go darker when you go outside into the sunlight?