TL;DR
Unload trains on elevated rails by 'dumping' the items beneath itWhat ?
With the new elevated rails, there is a potential new way of unloading cargo wagons similar to a method used in real lifeVertical unloading, this method would dump the items onto the ground beneath it (potentially causing a huge mess if there are no buildings underneath it) I would imagine that it could go directly into chests placed beneath it (perhaps it's a new kind of chest idk) or directly on belts or potentially even into machines