I feel like this could be the seed for a large market shift towards sustainable energy, which could mean that renewable energy would have a flood of unprecedented new competition.

Do you think this divestment and re-investment in renewables is sufficient to catalyze a sweeping change in the market?

I think it will be very helpful. I don't see many other oil tycoons doing it for now, though. I think the Rockefeller family did it because they are much more environmentally conscious than the oil industry is.