The way he describes his implementation sounds like a digital Utopia. A live scrolling feed of topics people care about, with the ability to look things up from the past.

Twitter is definitely a simplification of this concept: You get your own channel to post into. And you also get to choose which other channels to merge together into one mega-channel that you read. Hashtags can send your posts to other "meta channels" defined by the community. Search basically makes each word in a post go to a channel defined by that word. It's all quite simple and beautiful, and stoneage.