To have those push notifications work properly, you would need something like Google Now. You don't want notifications for the nearest tube station, you only want those for the stations you use on a regular basis. So Apple would have to know your daily routine for this to work properly. Apple is not keen on tracking copious amounts of its users data, so they may be opposed to this from the beginning. Then they have to have a web service to properly handle all of this. Poor web services is the biggest flaw of the Apple ecosystem.