Not only does my Moto X have a kill switch, i can also go to a web page and find it with google maps. I can also find my kids phones, which will usually tell me where they are. Google + Moto.
Very similar features to “find my iphone”.
So, the point is that there is no need for this legislation other than giving the gov’t control over your communication devices. They’ll probably sneak in the location tracking as well.