Article from 2010.

https://timesofindia.indiatimes.com/india/India-to-overtake-China-in-2020-Swaminathan-Aiyar/articleshow/5401981.cms

Excerpts:

China will start ageing and suffering from a declining workforce, and will be forced to revalue its currency

China's export-oriented model will erode sharply - the world will no longer be able to absorb its exports at the earlier pace. 

India will gain demographically with a growing workforce that is more literate than ever before. 

India will become the largest English-speaking nation in the world, overtaking the US. So, the global publishing industry will shift in a big way to India. Rupert Murdoch's heirs will sell his collapsing media empire to Indian buyers. The New York Times will become a subsidiary of an Indian publishing giant.

By 2020, Indian companies will be major exporters of nuclear equipment, a vital link in the global supply chain. So, India will be in a position to impose nuclear sanctions on others.