I Want Ideas

I’d like to see a new type of glass made. Glass made in such a way that it contains material or liquid that could darken or lighten in appearance without compromising the actual view through the glass. It could then be added to cars to reduce safety. In direct sunlight, the glass could auto-dim… at night or with no direct sunlight, the glass could then go back to ‘normal’. If it’s not physically possible to make said glass, surely some sort of surround or cover could be fitted to contain such a device which can control and filter light.