Went online to sony's site entered into a chat with a sony rep, asked the simple question about Ultraflix app being featured on sony 4k tv's. The rep said UF will be available by mid-spring on sony 4k tv's. It was that simple to get the information and I would tell all who think UF will be on Sony TV's just to go call or start up a chat online with a sony rep. That's the truth straight from sony reps. Not much else to say about that.