Clever. Not entirely sure it's applicable to a trailer; never seen one with a V-berth.
However, one could adapt the idea by having facing sofas that slide together. Possibly by embedding sections of mast track in the floor, and fastening the sofas to modified sail cars or spinnaker boom cars so they slide along the tracks. Then both sodas could slide together to meet in the middle as with the V-berth in the photos, or one sofa could slide all the way across to meet the other along a wall.