Not sure what the "not including silicon" means in that first story. Nevertheless, these are evolutionary improvements, not the revolutionary ones implied by th

Not sure what the "not including silicon" means in that first story. Nevertheless, these are evolutionary improvements, not the revolutionary ones implied by the hyped headlines. Don't get me wrong -- I'd love to see PV power production become prevalent. I've been waiting decades now, regularly reading stories about "paint-on" solar cells, etc., and getting frustrated at how the "paint-on" and "spray on" thing keeps getting headlines year after year, decade after decade, but somehow never becoming a product. Isn't it rational to question when the same "game changing" idea keeps making headlines, across years & decades?