Beside how reflecting sound introduces distortion and also soaks up certain frequencies I honestly do not see how bouncing sound off a wall sounds more spacious than a speaker aimed at the listener? Sounds like you had a great time at the Dolby Atmos Demo at CEDIA but I think I will stick with the direct route. But also to be able to have more than four atmos channels you would have to duplicate the side surround channels down the side of the room.