Scientists Achieve Optical Invisibility

Here's the paper:<p><a href="http://www.opticsinfobase.org/ol/upcoming_pdf.cfm?id=143769" rel="nofollow">http://www.opticsinfobase.org/ol/upcoming_pdf.cfm?id=143769</a>

What is exactly new about this compared to (scientific paper link at bottom): <a href="http://www.st-andrews.ac.uk/news/archive/2010/Title,59358,en.html" rel="nofollow">http://www.st-andrews.ac.uk/news/archive/2010/Title,59358,en...</a><p>I'm not a physicist but if someone knows enough that would be interesting.

I was hoping for some pictures but....

Seems like a fun project!<p>Does anyone know what the practical use of something like this would be?