I wonder if the future of conservation will include a strong focus on charging devices on our own. There are people with their own generators for example who actually supply energy back to electric companies. Now, at the opposite end of the spectrum is the key chain solar battery that basically allows you to keep your devices charged.
This little wonder is probably too small to help you charge your laptop but it could certainly add time to the battery life of a mobile phone or even a portable music player.
I should mention it can also be charged via a typical power outlet or USB if you happen to need to power it up at night or its an excessively cloudy day.