From what I've read, SlingTV broadcasts in 2 channel AAC stereo. If you have a home theater sound system, it's going to suffer from lesser quality audio. The PPV stuff is in 5.1.
I tried CBS All Access and it's stereo, too.
Also, I was reading about the new TiVo Bolt yesterday. It does 4K streaming (e.g. Netflix, Amazon Prime for now). It will have out of house streaming capability in 2016 like their Romaio product line. You can get TiVo mini boxes to turn it into whole home DVR. And it has cable card that works really good with Comcast - you can ditch all of the Comcast set top boxes and the like for the TiVo gear.
The out of house streaming feature allows you to watch your cable channels and DVR content anywhere in the world on handheld devices. Using AirPlay or chromecast, you can then watch on TV outside the home that has an Apple TV or chrome stick.
The downside is you have to pay $150/year (1st year is free) for their cable guide data.