More Advances in Invisibility

A BBC article briefly describes further advances in the prospects of creating an invisibility cloak.  While I think it would be awesome to have a material that can render a type of virtual invisibility, I am curious about how such a material could be made with an invisibility toggling feature, so that it could be visible when it needs to be and then turned invisible at the right moment.  Of course all of that is still a long ways away seeing as the material being worked on right now is still at the microscopic level.  Still cool stuff that seems to have some interesting potential.