Just thought the Geekzoners might be interested to know that Lightbox's app for Apple TV 4 is available now on the App Store. I think it works pretty well actually. Similar to Netflix ATV4 app (but then how many ways can you skin a cat I guess), looks pretty good. Quality of video and audio seems pretty good on my ATV4.
Airplay support still in the works apparently.
There's more details on Ligthbox's website here.