[hatchnyc]

Most revolutionary/generational tech has started with an implementation or at least a proof of concept of something new and novel that subsequently drove interest in how it worked. Like Google Maps use of AJAX for infinite scrolling or Napster and peer to peer networks, or even Bitcoin and blockchain. I’m not aware of any such example for Web3.

[vkkhare]

I believe edge computing is one of the game changing technologies for the decade. I am not sure if it can fall under the purview of Web 3 or not. For example one of the library I implemented was along training ML models on user devices instead of the cloud maintaining privacy and personalization.

https://github.com/NimbleEdge/RecoEdge

[basch]

Decentralized identity. Having an on chain address, and its holdings as your username + public assets. It's past proof of concept. It has not propagated to become commonly accepted yet.

[kyruzic]

The uniswap router.