It's fairly difficult to predict anything of note. Sure you can do some minor predictions for the 10-15 year scale. After that it's way more difficult to imagine what the potential changes people will enact with policy or technology. It's fairly apparent we are going to move away from fossil fuels, but that will take time. Fairly frequently enough that we have many notable inventors and scientists throughout history, a really smart person makes something that leaps our understanding of the world forward. Completely changing our worldview and alters the trajectory of our technology.