From a recent interview with the CEO of SlingTV
When it comes to helping our customers discover great content we are open to considering all options. As it relates to the “Live Channels” app on Android TV, we are looking into this. At the moment, I can’t comment any further, but stay tuned.
This would be killer combined with Tablo Live Channels support. Imagine being able to have Tablo channels, Sling TV channels, and Pluto TV channels all in one place, using one tv guide UI.
Interview here: http://androidtv.news/2015/12/qa-with-sling-tv-ceo-roger-lynch/