The really funny thing about this idea for those who think it is impossible. If they lived a few hundred years ago and someone wrote/drew something similar about an airplane, they probably would have said something similar.
I am not saying that this will happen in my life time (I am 51), but seeing how technology has gone so far in the past few hundred years. It would not surprise me if something like this was built, if people put their minds to it.
The question to me is not if it is possible, but should it be built at all?
Have any of you guys seen Robot Jocks? It kind of goes without saying, but the nation's defense budget needs to be invested in the development of a giant robot, to be piloted by the country's greatest hero.