When I posted that ZatzNotFunny had just posted an small article saying that TiVo was working on an update that would allow streaming over 3G/LTE and that it would include additional network options like port forwarding. The article said it would be released early 2014. Obviously it slipped, like pretty much everything else TiVo does. There was an FCC ruling back in 2010 that allows MSOs to use something called selectable output control. Which basically allows them to disable the analog outputs on the STB if the playing content is protected. As of yet none of the big MSOs are using it, except maybe on VOD content, but they could. And if that happens then your Slingbox will have the same limitations as the TiVo Stream.