27 Dec 2015 Arup Envisions the Skyscrapers of 2050. It is estimated that by 2050, 75 percent of the worlds – then 9 billion strong – population will live in cities. Urban Sprawl is already problematic and planners are faced with new challenges as they aim to build towards the sky rather than the horizon. admin pinterest 0 Arup Envisions the S via josephmedawar.