I like when technology and fashion merge because neat-o concepts like this get made. Practicality on the other hand can be worried about later (although practical applications of solar powered clothing exist).
From We make money not art:
“Solar cells are embedded on some of the tiles: they charge the dress during the day, and make it change colors in dimly lit surroundings.
“Each tile is designed in such a way as to accommodate a solar cell, a RGB LED, or a photocell, and jumper connectors (in the form of 0 Ohm resistors). A control board provides power, communicates with the tiles, and links to a computer via RF. The dress is completely modular both in terms of software and hardware.”