Ethereum - The First Case of Real Common Knowledge

The way that people interact online, whether it's social media or other things, is dictated by the technologies available to us today. Zero knowledge stuff can change a lot of that in ways we don't predict yet but fundamentally they'll allow people to selectively reveal information the way they want to. So over a long enough time frame that will have a large impact. If Ethereum didn't have things happening on it that are interesting or blockchains in general I think it would be less obvious that this thing would happen.