Not to be a total troll here but it would also be bad for a few reasons:
1. It would cost too much to be practical in a family car.
2. If I had kids I would never let them touch my windows

3. Higher car cost, higher insurance.
4. Replacement would be a nightmare.
5. Knowing toyota your super hi-tech windows would most likely contain 17 diffrent toxic chemicals, be prone to shattering and creating fragments.
It would be a neet toy but nothing more.
If it were created for cars as a HUD then it would probability become illegal very fast.