The beauty of a lot of modern computing is you can say "Look Mom, no wires!" At least until the batteries run out. Now, there are solutions available to provide solar charging on the road. I don't think any of them require you to wear a solar panel on your head. Check out the brief summary at TreeHugger.
I'm looking forward to getting one in the near future. Nothing like sitting on the back porch with my laptop and not having to come in when the battery runs out. If I get one I'll be sure to post a review.