Bill Gates invested in at least 5 Battery Startups who could revolutionize the capacity problems of the large power-grids worldwide: http://gigaom.com/2013/04/02/bill-gates-investors-back-sodiu... Soon replaced by graphene super capacitors..

How conservative do you sound when you promote Thorium reactors in a solar cell thread? ..some people have heard enough "positive" things about nuclear power now. There are cheaper, more reliable, regrowing and more efficient technologies that Nuclear power fans simply ignore. Nobody said that the power generated by nuclear fusion is lower than with green power, but definitely at scale.