China lifted billions of people out of poverty. India has been improving as well in that front. That means billions of people will go to bed without an empty stomach and wake up with much more hope than in the previous decades.
The world order is changing rapidly and moving towards a multi-polar world. That means the US and the west cannot impose their will on countries that doesn't suit their interests.
Regime change operations and other tactics used by the US will be much costly in the coming decades because there will be other powers to counter that.
That means millions of people will live peacefully with less violence. Without their life disrupted suddenly because someone thousands of kilometers away decided to change things over in their country.
However, there is looming threat to this prospect, how the US will handle it's internal politics. The more failed it becomes internally the more external power projection will be needed to maintain it's dominance. Most of the troubles happening around the world right now can be traced back to the US efforts to contain China's growth.
If you look at holistically, this shouldn't be this way, if the US spent most of the defense budget in public education and health care, it doesn't need to worry about China. It can keep it's dominance while there is a wealthier China existing on the other side.
However, as history has repeatedly shown, the pendulum always swings back. Empires crumples and new powers replaces it.
There is a glorious future awaits for those living in China, India and other rapidly developing countries.