We had it in the bedroom (by the sliders to the balcony) , that was where there was the most room for it. I think it could have fit under the TV in the living room maybe, though we did not try. To the eye, it seemed the same size as the living room at Saratoga where there is the pull down single under the TV. For example, I pushed the coffee table thing against the shelving under the TV and I had plenty of room to walk by between the murphy bed pulled down and the coffee table. If you didn't have the bar and the bar stools I would have thought the pull down bed would have fit but that's to my untrained eye!
I am looking at our photos of Saratoga and the pull down bed against the wall looks to be the same width as the shelving at the boardwalk, but it looks shorter, to accommodate the extended kitchen counter and the overhang for the bar stools.
I assume Disney measured this out and determined it wouldn't fit for some reason because otherwise its identical to Saratoga.