Meet Welle: an innovative solution that turns any surface into a smart interface for your connected home. It uses Sonar and a touchless gesture control algorithm to let you use simple gestures to control your smart home devices. The device is compatible with IFTTT, LIFX, Honeywell, SmartThings, Nest, and other platforms.
You will be able to use Welle to control your lights, speakers, coffee machines, your thermostat, and everything in between. This is expected to have an open API. More info is available here.