The little exclusivity pact the NFL and the major Cable companies have makes me have zero qualms about just straight stealing the content. If they have me a legitimate way to pay for every Packers game (directly through the NFL, not a cable provider) I would do it in a heartbeat, but they haven't, so screw 'em.
Apparently there's a way to signup and pay for NFL game pass using a VPN and pretending to be in Europe but I won't do that on sheer principle. It's insane to me I could legally pay for NFL outside of the US but inside the US I have to go through a third party (cable company) to get streaming access.
I wouldn't be surprised if DirectTV has some sort of exclusive contract to provide all of the games, but that can't last forever.
0 - http://www.theverge.com/2014/10/15/6982049/hbo-go-will-offer...
There is also a service called NFL GamePass which lets you watch games live if you live outside the North American market. I think the geographic restriction can be gotten around using VPNs & other geo-location defeating measures, but I've never tried.
The games for both NFL Rewind & GamePass are streamed via their website, and there is an official Android app, as well as a Plex app, and an XBMC plugin. The quality is not great, but it is better than nothing.
I'm pretty sure I'd regret giving those things up.
(I couldn't seem to reply to you directly for whatever reason)
It's not a technical limitation by the cable companies/NFL, it's literally just bureaucratic bullshit.