Make way for the fourth industrial revolution

When will the future arrive? According to the World Economic Forum we are already in the midst of the fourth industrial revolution... It's been dubbed the 'rise of the machines', but is the digital takeover here to steal our jobs, or help us move forward? Nicholas Davis, who is the head of the WEF society and innovation department talks to Kathryn Ryan about the potential consequences of the physical, digital and biological worlds merging.