I have thought about this since playing the reach beta and playing invasion. I think that there should be controlled turrets or cameras that players can use. They would be set up in two parts, one being the terminal that a player uses to control the camera or gun, and the other part is the gun or camera itself. They could be connected with channels like teleporters and when a player uses it they would only be able to see the view from the camera or the gun. This could add new gameplay elements, and in invasion players could work on stealth by trying to get past the cameras or guns without being noticed. This would be balanced by not allowing the players using the cameras or guns to look around themselves unless they disengage from the camera or gun. That way they would be open to an attack.
What do you guys think?