Carbon nanotubes continue to demonstrate amazing versatility.  For example, IBM recently announced 9 nm transistors that outperform silicon.  Nanocomp makes larger carbon nanotube structures and show, on their web page, 32 foot sheets. 

The web page, www.nano.gov, is doing a better job in 2012 compared to 2011 in conveying updates in the nanotech world, including the IBM development of the 9 nm CNT transistor.
The carbon nanotubes are a central theme in the nanotech patent literature.  For example, among the 11,256 US 977 class nanotech patent publications, 37.1% of them mention carbon nanotube or nanotubes. 
It would be good, many would argue, if the United States could develop a coherent, dependable  policy to to commit to develop carbon nanotube technology, and similar nanotech wonders.  The benefits will range from 9 nm to 32 foot technologies.
Defense will be a leading driver to push the envelope on new materials leading to new products. 
Private sector venture capital priorities will rise and fall, which is fine, but US policy can promote a more stable, dependable effort to drive the future.