Usually a blight is something you'd want to avoid, but according to Unplggd, if designer Vincent Gerkens has his way, the more blight out there, the better.
Fortunately he's referring to Blight, a concept that involves attaching solar panels onto venetian blinds. As the Unplggd article points out, Blight is a word play on "blinds" and "light," which I probably would not have figured out on my own. The panels soak up the sun during the day, and at night they light up your life. Or room. Or whatever you need illuminated, I suppose.
Basically, sunlight charges a battery cell on the top of the blinds. Then when you're ready to do some reading or conduct your weekly game of Canasta, you now have the power of light (!), at night, using no extra power.
Hopefully this will hit the mass market soon, as I'm sure many YouTube videos will follow showing just how well these can illuminate a room. This is a start, but other than the obvious OCD nature of the guy in the video, it doesn't tell me much.