Its Actually the 3rd or 4th game to use the camera....
So you see, it is not the first at all. From what I have researched Ghost Wire, TBA starting using the camera to catch Ghosts concept before all those already mentioned, they simply have not released it yet. All of these can be proven-examined further buy using the site search option.
However this is an interesting and somehat fun game and I'm just wondering why more people have not purchased it. It seems to have had a limited release as everyone I ask, no one has actually seen it released, except myself. In my experience, that was like Electroplankton and meant that the release saw limited production, and poor marketing in the various medias, comparatively lower than most game releases.
Even though it is not the first game really using the camera, it certainly belongs to a category that is well under-used or should I say, under-applied.