Very true. Maybe its the camera angle of that photo but that space looks pretty wide open. Much more area than I would expect of the 747 galley area.
But that's the entrance to the plane. First class and business class passengers will either turn left or go up the stairs while economy passengers will turn right. There's got to be quite a bit of room to handle up to 479 passengers boarding. One of the options will be galleys in the currently unused crown space above the economy section. This will allow another 12 economy seats.