From an artistic standpoint it is absolutely amazing what they did. As far as using it to manipulate or make us believe in something thats not there... some of it worked a lot better than others. A good chunk of it (such as the water, and oil dripping down the side) didnt feel real... just felt as a great exercise in projection technology. While others (the giant human face, etc) did really give the feeling of 3D, however I dont know if it would translate as well if I was right there.

If this technology is out now on an artistic way, the government probably DOES have much better revisions on this technology so i could see it happening.

I don't know about manipulating the public for nefarious purposes, but I can tell you this I'm never going to trust another ghost video again