Molecular level circuitry designed to be built with DNA, like coral organisms build a reef? It may be the next step?

Viruses building molecular "coral reef" chips?  (Right onto your gray matter for a telepathic internet connection, yikes).  Holograpic 3-D images guiding the viral "construction workers".

How much simpler would it be to build out rooftop concentrating solar PV that is 39% efficient (NREL verified at only 10 suns concentration) that uses 10% of the silicon.  

We are at the begining of the efficiency curve for solar, relatively low tech improvements yield large gains.  

Eventually mollecular engineering might make ambient temperature superconduction possible, that in turn might make near 100% efficient, total spectrum (heat as well as light converted to electricity) solar PV possible.  

The whole human world powered by PV cells.  Cheap, mass produced almost no cost energy for everything.  Organic superconducting solar PV  grown in a culture.

Subsidizing solar PV with a 10 cent per kwh payment to homeowners would pay off right now.  And get the whole renewable energy revolution going.