The main issue I see with gesture controls is that compared to traditional inputs, you are doing more work and making bigger movements. For certain situations,

The main issue I see with gesture controls is that compared to traditional inputs, you are doing more work and making bigger movements. For certain situations, like gaming, where 1:1 movement can be immersive this makes sense. For others it does not. I do think a system that allowed you to use small hand and finger movements to control your devices make sense. The large gestures don't seem to be optimal in most cases.