The closest thing i can think of to the "big thing everyone has missed" is solar power, although the caveat to that is people have definitely already thought of that for a very long time and also the only reason it isn't used worldwide is largely the greed of oil companies<br><br>its REALLY obvious that the sun, the thing that makes life on earth a thing, and a practically infinite source of energy that is constantly beaming down on the planet, would be the best source of power but people still think its impractical