I hope they are going to agree to reduce the number of nuclear missiles in existence or to be built.
The budgets could instead be spent on upgrading or building more useful infrastructure, like bridges in India, oil refineries in Nigeria, etc. etc., not to mention schools, hospitals, dispensaries, factories, farms, housing, shopping malls....
As there is less stress and more friendliness between nations, each nation can develop to the fullest extent of its gift of resources and talents of its people, a happy world where nations can trade and feed and make their people happier with improving living standards.
A cessation of warfare which has left so many nations impoverished will open up a new chapter in the history of our Earth, known as Little Blue Dot in the galaxies.
People of countries where they have civil wars just have to look at the folly of it, and how much better it would be to have a peaceful understanding and then allow their nations to develop. They would all be better off with Peace, which must be God's plan.
With peace will come improvements, and prosperity will develop from there.