India will have a good run, as long as oil prices remain low. It still have to do reforms which the Central and State governments are not willing to do. Even though Modi is supposed to be the pro-business friendly messiah, the politics and yearly elections at state level put certain binds and limitations. India will have growth, and lot of people will be millionaires but I would be surprised even in 2030 if India surpasses UK or Germany, and makes into TOP 5. The economic policies are not cohesive and politics for a lack of better word are "Tribal".