What does the future architecture of blockchains look like?

We already have rollups as a separate execution layer emerging out from the general purpose blockchain. Newer technologies promise further modular separation of data availability, consensus, and settlement.

Will this happen? Will blockchains become modularized?

The history of general purpose computers is one of increasing modularity. Inside the computer exists the CPU, RAM, cache, BIOS, and more.

If Ethereum is a distributed “world computer”, by analogy, it’s conceivable it may also undergo modularization into specialized components in the future.