Flexible Solar Power: a peak into the future?

A few years ago, the idea of having solar-powered clothing would only seem possible in a Hollywood depiction of the future, where cars fly and far-off galaxies can be reached by "warping" through time. While those technologies are certainly still in the distant future, perhaps permanently in our imagination, harnessing the energy from the sun with what you wear is a reality.

Highly-flexible solar cells hold promise as a means to charge our phones or ipods by simply going outside on a sunny day. Researchers at the Frauenhofer Institute have developed a 20% efficiency flexible solar cell that will be on the market at the end of the year. The first market the company is targeting are bike and snowboard helmets.
The helmets will start around $400 and will be bluetooth-enabled. Or, you can buy individual units for $125 and use it for your own purposes (backpack? jacket?) As efficiency grows, it seems likely that other companies will take an interest in the flexible solar cells to incorporate in new clothing and sporting equipment.