The global population is older than it has ever been. But the grey brigade could provide a new era of productivity and hope for the world, writes Oliver Haenlein.
In 2008, the number of people aged 65 and over in the UK was around 10 million; by 2031, however, there will be 16 million. Globally, the amount of over 65s is projected to almost double over the next 20 years, from around 600 million to more than one billion.