Some Ideas ....

- A way to play a a PG-13, PG DVD movie in a "G" mode, which a erases, mutes the -G parts !!!
- Superconductive paint that fractionally increase the temperature, so that water, snow, ice doesn;t stick to it.
- A cell phone with GPS that can guide you to your car in a parking lot

cheers

PS: Feel free to add ....