The advantage of the world-computer is that everybody agrees with your results. There are some problem domains, like advertising, where giving every person the

The advantage of the world-computer is that everybody agrees with your results. There are some problem domains, like advertising, where giving every person their own reality increases net wealth. There are other problem domains, like money, where giving every person their own reality makes them utterly useless. Ethereum expands computation to problem domains where it's critical that everybody gets the same answer.