Does blockchain and AI belong in the boardroom today?

This discussion paper from NACD presents blockchain as a disruptive technology that could be as transformative to business as the internet. And I know the same arguments apply to Artificial Intelligence (AI). It highlights the new risks posed by introducing blockchain (or AI) to manage some of your data as a topic of interest to the board. It also argues that boards have to discuss blockchain regularly as part of their strategy session, conceding that expertise on this topic is scarce and that wider adoption will not happen before 2020. Directors of companies that are the closest to be impacted by these technologies, financial services and healthcare for example, have a responsibility to start educating themselves. Do you have good reading material adapted to directors to suggest on blockchain and AI?