New Zealand based design firm George and Willy have created a modern hanging clothes drying rack that drops from the ceiling on a pulley system to dry and air your clothes. GOOD details of requirements
French design workshop Atelier Décadrages, designed the BedUP, a space-saving design where the bed is raised to the ceiling to provide more space in the room when not in use I do not understAnd this but it's pretty solid concept
a pulley-system schematic for a train-layout that can be hidden away up against the ceiling and brought down as needed/wanted. Some trickiness with this, but if done properly, it could be amazing! Especially for small-gauge!