If Ethereum was Bitcoin 2.0, and added smart contracts (Szabo, 1997) to the state, then how Vitalik Buterin has described what Ethereum 2.0 would look like is that it would use sharding, with thousands of individual shards that all manage a piece of the state as a whole, and if you need to send a transaction from one shard to another shard, then the message finds its way across, via a sort of jury selection.

A lattice state makes sharding possible

Rather than collecting transactions into blocks, and appending those blocks onto a chain (line) of block, BitLattice uses a multi dimensional, laminar lattice state. Transactions are linked to four surrounding transactions, within a lattice, and their position is cryptographically signed by what Hibryda calls "authority entities", which are embedded in the lattice itself, and referenced by nodes when they add new transactions to the lattice (similar to miners in a blockchain. )

The "authority entities" trigger each other with calculation requests, and compare results to be sure that a transaction is valid.