Today's internet is more like "equal participation welcome", the decentralization being talked about in the article is at the ISPs level. Rather than having to choose from a few incompetent and monopolistic internet connectivity providers, decentralization would individuals to share wifi hotspots and create a mesh to which you can connect to. Ideally, this would allow people to get rid of blood sucking ISPs and would not be affected by the recent net neutrality disaster or any more of such but practically creating reliable high-speed user-participated decentralized ISPs haven't been possible, but might soon be.