Yeah! It's a pretty big omission in my post that I don't talk about other methods of generating Voronoi diagrams, but I wanted to keep it relatively short.

Chris Wellons has a great article on the method that you mention: http://nullprogram.com/blog/2014/06/01/

It's also mentioned in the OpenGL red book: http://www.glprogramming.com/red/chapter14.html#name19