According to @VitalikButerin, PeerDAS in Fusaka literally is sharding, allowing Ethereum to reach consensus on blocks without any single node seeing more than a tiny fraction of the data (source: Vitalik Buterin on X, Dec 3, 2025). He adds the design is robust to 51% attacks through client-side probabilistic verification (source: Vitalik Buterin on X, Dec 3, 2025). He characterizes this as a significant development for Ethereum (ETH) (source: Vitalik Buterin on X, Dec 3, 2025).