For long haul flights, I would like to see all seats eliminated in favor of "shelves". These shelves would run the entire length of the plane, stacked 4 or 5 shelves high, similar to bunk beds but with just enough space for a passenger to turn their body over. Anesthesia would be administered to each passenger and everyone would be awaked on arrival. This would make these 11+ hour journeys much more bearable for me.