Well, hypothetically, let us consider the following scenarios that might occur on the assumption of above said,
India evolving its position by considering Tibet a sovereign part of China rather than a suzerain and thereby ending the 'de-facto' Tibetian govt. & negotiating the return of Tibetian refugee's back to China.
Supporting China's postion against the 'West' on the issue of 'Currency Wars' in the IMF, WTO & other international forums.
Supporting China in the debate of 'economic burden' of Climate Change among developed & developing nations.
A market of 1.5 Billion for Chinese goods.
An alternative better equipped shorter route from Arabian sea & Bay of Bengal to Western China through Ladakh & Nathu-La pass respectively.
Maintaining China's status-quo in the Indian Ocean & the oil-route by 'not' supporting US & Australia.
Both countries should realize that as both nations are being touted to becoming a great powers in Asia & then the World, we shouldnt let a third party, Pakistan in China's case & US in India's case jeopardize 'everything' that our fore-father's have worked so hard to achieve.
Lets us just concentrate on fighting poverty, illitracy & hunger in our own countries & maybe and just maybe, we could fight each other over a game of cricket or ping-pong..
. The opportunities between India & China are limitless, with our 5000 year old history being a prime example..