It seems like a reasonable model, if you only care about business, or if you see all of history as an arc ending in decentralized, coin-based whatevers. On the other hand, if you don't care about business, but only care about development, you'd define different eras of the web in terms of what technologies were predominant. If you care about consumer devices, you'd define it in terms of what gadgets people used to get online. And so on.

People who make up models on Twitter, or for blog posts, generally make them up to demonstrate a point. That's what Dixon did, that's what this author has done.