The Japanese millary of some kind are developing something that does that.. Like a rain coat (Like the free things they give out, ponchos?), that basicly mimics what's on the oposite side of the thing. Kinda like holding a TV screen on one side of you, and a video camera connected to it on the other side..
It won't make you invisble, but it makes you veeerry hard to see from any distance..
I've seem some pictures of it a while ago (can't remeber where), and it make a vauge version of what was behind the wearer, on the front of the material.. Was quite cool
(That was well over a year ago) (It was flexible as well, which is impressive)
So, it's real/non-scifi!
Same princibles apply to a unit (same as the tank)
Depbo it and have a look
(The maker described it on the BIS forum too)
- Ben