As djelimon pointed out, vaporizers have come a long way from the early conduction/hotplate models which did a good scorching your herb. Now we have ceramic heaters and lots of glass for clean convection action. But where will we be in 10,50,100 years? Is there really that much room for improvement? For one, I'd like to see super accurate, automatic temperature control... I mean to the level of current day million dollar scientific equipment. High efficiency solar powered vapes would be nice. Maybe we can use lasers as a heat source... kidding.