uBeam is close to create wireless charging using ultrasonic transducer, up to 15 feet. I hope it's safe for humans to be constantly bombarded by ultrasound while sitting at Starbucks.

Read more here uBeam’s Ultrasound Wireless Charging Is Real, And About To Be…
What if wireless power at a distance actually worked? It does. uBeam invented a way to wirelessly send energy up to 15 feet away with ultrasound. What if..