Ethereum co-founder Vitalik Buterin has proposed the implementation of 'transaction simulation' features to enhance the security and user experience of Ethereum wallets and smart contracts. Buterin suggests that users should first specify their on-chain intentions and then review the simulated transaction outcomes before confirming or canceling the action. This approach could be combined with spending limits and multi-signature approvals to ensure alignment between user intentions, expected outcomes, and risk thresholds. The goal is to make low-risk operations easier and high-risk operations more challenging. Buterin acknowledges the complexity of defining user intentions and notes that while a perfect security solution is unattainable, a robust approach would involve users specifying their intentions through multiple overlapping methods, with the system executing only when there is consistency. This focus on user intention is applicable to wallets, smart contracts, operating systems, and hardware.