Expecting? I would say no. The company never mentioned Roku specifically. However, a poster here saw in DigitalTrends the following: "The streamer supports both HEVC (H.265) and VP9 for decoding 4K Ultra HD streams from the likes of Amazon, Netflix, Vudu, UltraFlix, and YouTube."

I don't know if Ultraflix will be pre-loaded, but it will be a featured app SOON after imo.