Well in the next decade or two, these guys will be competing each other for economic power in that region.A lot of Indian see China as rivalry, and hope China to go down. Is that true?
Plus with both of their humongous population, both of them will try to woo as many companies as possible to provide jobs to their people.
Thankfully the rivalry is more on who gets to sit on the throne after USA, and not two hostile, densely populated, nuclear armed nation out for blood!