He's just proving a point. xP
That Nano stuff sounds really impressive!!
And I dont care how they did that Invisablility Cloak... If you'd read what can be found on Google about it, you'd see they've invented something called "Retro-Reflectum", its not just projectors. How would they do that video outside, with a big projector following him???... The projector would have to be able to project an image that bends around him and doesn't shine on anything else in that room (or his tie). And it would have to be places right where the camera man is in the outside shot...
Those vids are pretty amazing!
Here's one artical found with google:
http://news.bbc.co.uk/2/hi/technology/3791795.stm