http://www.youtube.com/watch?v=oBNyIATkSE4 - first bad, then good
http://www.youtube.com/watch?v=z_0fnl26Z5c - quick Arma2 demonstration
http://www.youtube.com/watch?v=cG7SNTDCQyQ - Arma2, longer and much more immersive. Shows headbob, freelook, and spatial body awareness the way it should be. No way nobody can call that intrusive. View all of them if you can.
It adds not only a little to immersion, it adds everything. I just hate it if I switch to 3rd person and the posture doesn't even match what I see in 1st person. Then there is these hands weirdly sliding across the screen, wtf is that? Immersive? Hell no, it completely ruins the whole feeling. In FONV, where you aim your weapon according to your crosshair doesn't even remotely match up with where the barrel points. Considering FO4 will probably build on Skyrim, why not get it right in Skyrim as well?
Really can't understand why some is actually against it... Jeez