Gestures might be needed for some cases, but there are many situations when you could just use the smartphone as the control device. Often I do have one hand av

Gestures might be needed for some cases, but there are many situations when you could just use the smartphone as the control device. Often I do have one hand available, but the problem using a smartphone is that it requires me to stare at the screen. For example walking in the city, driving the car.