Touch controls have dominated the last six years, riding the wave of the mobile market. The next wave of tech will incorporate touchless controls, input no longer restricted to physical contact or screen size. While it'll be awhile before functionality catches up with touch controls, companies can still capitalize by integrating new interface controls before the curve.
By being the first to incorporate new tech, companies can ensure their place of attention from the industry and community.

Touchless controls are the next intuitive step to free users input from the restraints of screen size. The Galaxy S4 has already incorporated touchless gestures, mainly for navigation. Google has also already placed an emphasis on touchless controls with the new marketing campaign for the recently red Moto X.

It comes with it's own set of technical difficulties as interpreting human motion is problematic to say the least.

People are accustomed to the 1-1 interaction from input devices such as a mouse or stylus, it will take an adjustment period to adapt to touchless controls untethered to a physical device.
Companies such as Leap Motion and Microsoft already have devices touting touchless controls on the market and constantly improving upon the technology. Smartphones are also capitalizing on this input concept for minimal functionality such as waving or voice control/searches. While not able to monitor every movement for input controls, used in specific applications it can augment existing controls for convenient/repetitive/hands-free tasks.