On the other hand, a passive photovoltaic material built into the camera's shell could be a very, very useful thing in some situations, if it could be harnessed to charge the battery. Of course the limited area would limit its ability to charge the battery, but if it were combined with a camera that had a special energy-budgeting mode where it used nearly no electricity, like an old film SLR?
Wow, talk about a niche product, right?