RINA CHANDRAN THE novel coronavirus has upended many aspects of life in cities worldwide, particularly as large numbers of white-collar workers choose to work from home and shun public transit - shifts that are likely to last, according to urban experts. This will have an enormous impact on city centres and central business districts (CBD) that have typically been the economic hubs and main generators of income for cities. What is the future of city centres and CBDs, and how will cities adapt? Here are some views. MONO TO MIXED USE The South Korean government has said it will buy…