[ZOOKER]

I know it's currently vaporware, but...
Imagine a cheap, efficient device to convert heat to electricity - what a game-changer!
No more turbines, heat exchangers or bulky cooling systems to convert or dissipate heat.
cheap, efficient solar panels using no rare earth minerals, just mirrors to concentrate the sun's rays directly into electricity.
ANY heat source, even a campfire, could be an electric generator...

[GingisK]

Imagine a machine that can turn heat into friction.