India is a fragmented country and Modi has to win another term impressively to get any kind of "true" reforms. Even if he succeeds, its the South and West leading the economy and Hindi heartland playing catch-up in spite of being political and population center.
India will develop unevenly Gujarat, Maharashtra, TN, AP will forge ahead. The interior will have lesser impressive growth.
As long as India periphery is culturally diverse from Hindi core, India is not going to get anywhere. It will grow and medium pace and will make it to middle income in 2040, but nothing stellar.