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Detection of objects left on a car roof.

A YouTube Video of futuristic ideas published by TI indicates that methods exist to detect objects accidently left on a car roof.

My company makes automotive car roves (glass) so I'd be interested to know what is behind the promotion of this as a futuristic automotive technology.

I've interests in adding electronic functionality to vehicle glass generally so you might be able to point me toward other automotive futuristic ideas where there is some logic in integrating automotive glass with electronics.