Xbox One Xbox app on different network

[Gerry Booth]

Is there any way to connect a tablet to the xbox one without being on the same network? I cant find any mention of the subject but im sure there has to be SOME way because it would make the console streaming feature in the game streaming preview pointless if there isnt... I mean, Why use a mobile device to stream games from your xbox when ur on the same network and could just play directly on the console?