Yes, it's obvious. There's no way a single person will consume as much energy as the whole country does today. These days, the energy use per capita goes down in developed countries, so the current energy consumption growth is mostly due to poorer places catching up.
You seem very sure about how humanity will look like in 500 years and how much energy it would use.
Obviously you consider the concept of Type II and Type III civilizations impossible and ridiculous, since they would use more than 20 orders of magnitude more energy than we do.
Note, that when I said "all of India being airconned" I literally meant all of India, as in the whole subcontinent being a single giant city with 100 billion people living in it. And on that scale you need energy not only for airconn, but food/water/waste disposal/... But I guess you exclude that possibility too. It's understandable through why you would just imagine that I was talking about making India into something like present day Europe. In general people find it really hard to imagine anything radically different than the status quo.