Vitalik Buterin has outlined potential future models for on-chain mechanism design. According to BlockBeats, these models include mechanisms similar to prediction markets, which aim to maximize openness and accountability by allowing anyone to buy and sell, rewarding good decisions and penalizing bad ones. This approach is suitable for creating a 'decentralized execution layer.' Additionally, Buterin suggests decentralized, diverse, and non-tokenized preference settings, such as anonymous voting with MACI to prevent collusion, to maximize intrinsic motivation and avoid token holders gaining control. Prediction markets are considered the best primitive for achieving 'decentralized governance.'