Who believed in the future of the mobile phone back in 1980...
Futurist John Naisbitt coined this expression. Behind it lies a social and/or technological development (trend) in western society, but increasingly also in global society, which has an especially sustainable and substantial impact. Globalisation itself is a megatrend, for example, and the same applied, or continues to apply, to mobile communications and the internet, higher life expectancy etc.
Megatrends bring about a fundamental and comprehensive change to life. Just as telematics will.