I hadn’t heard of all of these.
I keep changing my mind over which of these will make the most difference, but for now I’m going with Printed Solar Panels. Imagine energy independent individuals, much less countries. Oh, I know that dream is still a few breakthroughs away, but getting solar panels on everything is the next step.
But ultimately Phase-Change Random Access Memory might make the largest change. James Burk argues that anytime there is a fundamental change is how we organize our data, the world goes threw a sea change. I’m not sure this is a fundamental enough change, but it’s a biggy.