|On 2015 models?|
"Frank Stephenson said his employer is developing a system that can repel material from a windshield by creating a force field using high-frequency sound waves.Such systems were originally created by the military for use on fighter jets. Stephenson didn’t go into detail but explained that an ultrasonic transducer on the screen could send 30 kHz waves of ultrasound across the surface and repel all debris--even snow and insects. Benefits of the system are said to be improved visibility, since debris would be repelled instantly, as well as improved aerodynamic efficiency, due to less drag".CNetTV links to a 2008 Fioravante demo video but I can't get the sound to work.
There's a video clip of a related concept which coats the windshield so that water beads on the glass instead of wetting it.