Well, a number of countries will be forced out, simply because PSN is not available there. Especially the philipinos seem so be quite upset.

PSN is available in 69 countries around the world. (Source: https://www.playstation.com/country-selector/index.html)

right now there are (roughly) 190 independent countries in the world.

The whole of Africa (except for SA; thanks to u/ItzOnza), Egypt and even european countries like Belarus don't have PSN.

The Baltics - states that are part of the european union - are also excluded.

These people can't create accounts.