Is this really necessary in life?

This is Jason's backpack. His SOLAR-powered backpack. Yes, those are actually solar panels. He won this in a Yahoo Goes Green/Freecycle contest a while back and sets it outside every few days to charge. What it needs charging for I have no idea. Does it talk to him? Make coffee for him? What? I've heard something about him charging his cell phone but that's really only good if you take your backpack with you everywhere you go, right? I guess using the battery in it is better than electricity but it's still weird. I think my husband (that I love dearly just for the record) might be just a bit of a nerd. I'm just saying.