Most of this will probably not be needed by the time we’re creating assets and showing people what we’ve got besides Proof of Stake (could be a nice history lesson, though)

Concept | Concept Map

Beacon Chain

The Merge

When ready, Ethereum will merge with the Beacon Chain becoming its own shard. In addition, the mainnet will bring the ability to run smart contracts into PoS and the full history and current state of Ethereum