Whilst i agree with most of the views expressed here... you do all seem to be forgeting a point.
natal is a new tech, it probably won't be perfected for at least a year or two, yes it may come around at the same time as reach but i doubt it will be implimented.
But to disuade some of the negativity here about FPS and natal, truely i miss the days of the lightgun, and by using some means of movement, firing and actually getting in close to use a melee attack seems fun to me, a word that's not used that much anymore.
Remember guys halo CE was something special, but foremost fun.
I hope when bungie do decide to work with natal on "halo 3D feel the pain" (tm) that we can all experience a simulated "real" firefight in our living rooms.
Keep up the good work bungie!