The rising powers of India and China are likely to be competitors. If Russia and China couldn't remain close allies with the unifying ideology of communism to hold them together, I don't think that China and India could ever really be more than commercial associates. It doesn't mean war is inevitable. But becoming allies seems far-fetched.
One intersting aspect of the competion in the military realm is that decisive land operations against each other are severly constrained by the Himalaya Mountains that separate them.
I imagine Indian strategic thinking isn't familiar with Western sources any more than I have much grasp of the history that Indian strategists draw on. Perhaps the Indians have sources more relevant to them, but I suggest the Indians review Thucydides' The History of the Peloponnesian War.
Defending the Long Mountains could draw some lessons from Athens defending the Long Walls.