I have this utopian vision of being able to look back on this period of time as the tumultuous beginning of the end of powerful national militaries. In this utopia, military forces exist primariliy as a international coalition body tasked with the total elimination of groups like I-fuck-goats-sis, Boko Haram, etc. Maybe really antagonistic countries hold onto their (decreased) nuclear arsenal as a deterrent to other equally antagonistic countries, but by and large fissile material is used to build and supply reactors to start a massive desalination campaign anywhere it's needed.
I'm really hopeful that disarmament will result in some sort of international task force. Unfortunately it seems like the reaction to USA's military reductions is increased investment in national militaries by US allies in regions with instability (saudi arabia, phillipines, japan, and eastern Europe come to mind). The US military has been used to do a lot of harm, but I wish we were replacing US disarmament with something better rather than just creating a hole for other nations to fill.