OT: have you ever noticed that most scifi movies depict futuristic cars that can hover or fly but which still use traditional windscreen wipers. You'd have thought they'd add a force field that repels rain or a special coating but no, traditional wipers. Even Bladerunner 2048 did this.
I always think it's a bit incongruous to see them on the cockpit windows of airliners. Sort of like having a vacuum tube power supply for your computer. (Two other solutions exist. One is spinning the window, you'll see it on ships. The other is making the window hot.)
Many airliners already use heated window panes for de-icing. Heated windows don't work all that great in a downpour, and wiping is a simple and faster acting alternative.
Blasted air is used minimally for windscreens, but it's a common plane de-icing method for the rest of the vehicle.
The complexity and weight of using spinning windows on planes makes that idea a non-starter.
hydrophobic coatings are also in use, but are generally avoided for the duty of primary windscreens due to most hydrophobic coatings lacking durability to physical stress and contact.
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