It would be so cool if all our gadgets should came with their own built-in power source. Any thoughts?

Btw, this self-powered camera from Japan runs on solar and hand-cranked power. It can be powered from USB as well & has a 3 MP sensor with 3 shooting modes. 

http://www.designboom.com/technology/sun-and-cloud-self-energy-generating-digital-camera/