No doubt renewable energy is going to make up a much larger share of our energy sources. I don't know when, but it will probably be a lot more in the long term than many people think, but also probably a lot less in the short term than many people think. It will be there, but we need to remember that the fossil fuels that we currently have will play a role in the energy sector in the future in some capacity.
On May 2nd, 2016. See this statement in context.