According to ChainCatcher, Justin Drake, a member of the Ethereum Foundation, answered the question "Are there any plans to further expand Ethereum Layer 1?" in an AMA.

Justin Drake said: "The elegant long-term sustainable plan is to use SNARKs to expand the execution of L1 EVM without limit. With real-time L1 EVM SNARKing, verifiers can verify cheap SNARKs instead of re-executing EVM transactions. In addition to the vertical expansion advantages brought by a significant increase in the L1 EVM Gas limit, there is also an opportunity to use EVM-in-EVM precompilation for arbitrary horizontal expansion to cheaply verify EVM execution within EVM."