Optical black-hole

http://www.newscientist.com/article/dn17980

 

The idea of having a material that will completely suck in power is interesting.  Not using gravity, but instead using meta-materials to guide the waves down into one spot is quite interesting. 

 

This might finally solve the question of what is the "blackest black"?

 

It could change not only design but elements of color.

 

On the solar side, yes the key points were highlighted, ability to avoid concentrators.  Or have more effective/efficient use of solar materials.