Touchscreens on smartwatches are limited by their very nature; theres only so much you can fit on a tiny piece of glass. However, Samsung might overcome that surface area limit if it ever implements a recently published patent application. Its smartwatch concept would let you perform relatively complex tasks just by waving your hands in front of a built-in camera. You could send content to a TV just by flicking your hand, for example, or select something by pointing your finger.