A:Answer Depends on your goals. The one connect box in its basic form allows you to have only 1 cable running down from the set for all the A/V stuff. You also have a power cable.
If you want a very clean setup, you should look into something called a power bridge. Basically, this is a pair of electrical boxes that connect behind the wall like a hidden extension cord. You then do the same with the one connect cable through a separate pair of boxes. The cable is rated for in-wall.
But the really nice thing about the one connect is that you don't have to mess around behind the TV every time you add a component. The one connect box is down near the equipment and easy to access.