Scientists Achieve Optical Invisibility

Here's the paper:

What is exactly new about this compared to (scientific paper link at bottom): http://www.st-andrews.ac.uk/news/archive/2010/Title,59358,en...

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!

Does anyone know what the practical use of something like this would be?

The practical use of an invisibility cloak?

Besides military and women's lockerrooms.

Paint wind turbines with the material and you remove the only obstacle to placing them near population centres.

...or airports...?

And ninjas. Don't forget the ninjas.