EigenLayer

In 2013 @VitalikButerin loved Bitcoin. However, Bitcoin was limited because you couldn't build arbitrary programs on top of it. He created Ethereum to take trustless execution of Bitcoin generalize it to arbitrary apps.

In 2021 @sreeramkannan loved Ethereum. However, Ethereum was limited because apps had to be built within the Ethereum virtual machine. He created @eigenlayer to take the trustless execution of Ethereum and generalize it to arbitrary usage.

My personal view is that EigenLayer will be the most important launch since Ethereum itself. It enables Ethereum validators to secure arbitrary programs not running on the Ethereum blockchain. You no longer need to bootstrap a decentralized network to run a decentralized program.