Free camera movement
Free camera movement means, you are able to zoom in, rotate and even pan the camera up and down. This means, you are able to observe the entire happening from first person perspective.
This feature is included in Games like Ground Control or World in Conflict (which is actually a follower of Ground Control). Example can be seen at "Media".
It would add an incredible feeling, like you were actually there. You can watch the sky and observe the battle at close sight.
It might be distracting or confusing to use that feature.
For those who don't know what I'm talking about, have a look at this.