My quest for an entirely maintenance-free house plant continues, but this new vertical garden from Flora Grubb comes close:
Above: A lightweight Airplant Frame made of powder-coated aluminum won't rust, so it's suitable for indoor or outdoor use; 19 inches high by 11.5 inches wide and available from $195 from Flora Grubb.
Above: Designed by Landscape Architect Josh Rosen, the airplant frame can be removed from the wall with tillandsias still attached. Submerge the whole thing to water your air plants.