This diagram I made in 2011 explores the relationships between 2 aspects of emergence: the multiplicity of entities, and their specialization.

This 2016 article from a French researcher Vincent MIGNEROT (English text) reminds about the "Technological singularity", a point of no return where we'll have brought computers up to a level where they'll independently continue their emergence and overtake us. (see I Robot, Matrix, etc.) This point however might be less threatening than the "Ecological singularity", a turning point of self-amplifying damages to the environment, which will herald human decline.