The future is hard to predict, even for pioneers. We are now on the cusp of the Metaverse, but consider one last time, the last two eras of computing and networking. Even the most ardent believers in the internet struggled to imagine a future in which there might be billions of web pages across millions of web servers, 300 billion emails per day, with billions of daily users, and a single network, Facebook, counting over three billion monthly users and two billion per day.

— The Metaverse: And How It Will Revolutionize Everything by Matthew Ball