Office windows as solar power generators? That's just what the Center for Architecture Science and Ecology (CASE) located in New York plans to do.

Anna Dyson, the head honcho at CASE states that tall buildings have windows with large surface areas which provide a lot of surface to generate power from captured sun's rays. By using a technology called ‘integrated concentrating dynamic solar façade’, a grid of clear pyramids are inserted on a window. These pyramids contain a lens which can focus sunlight onto a highly efficient solar cell by over 400 times intensity. What these pyramids do is they rotate to follow the sun throughout the day and generate the electricity to heat, cool, or light buildings. And these solar cells have a fluid around them to cool them off which also captures the heat that didn't convert into electricity which can also be used for heating or cooling a building.

Of course this technology is expensive and so its implementation may be cost-prohibitive. But someone out there will be sure to create a more cost-effective version of it not too long from now, I'm sure.