I have for a while theorized that transport is what causes an (undue) aggregation of power. Cheap mass shipping was needed for the current industrial globalization to even work. Cheap communication is what gave rise to the internet giants we have today, and the power structures in general.
Transport of energy, especially electricity, is still relatively expensive, and so a distributed structure is naturally preferred. This, along with the ability to produce it in a more-or-less decentral way of course.
If we one day figure out really-cheap transport of electricity, I'm 100% sure it would only take quite a short time for a few global companies to stomp out all the competition.