Hi @Anonymous User
At the moment the only Apps on the smart box which is showing 4K HDR content is Netflix & YouTube.
In theory the new smart box should be able to offer 4K HDR on NowTV, but i personally can't see this happening anytime soon, where we are still awaiting 1080p to be rolled out on the NowTV service which is scheduled sometime late 2018 or early 2019.
If we ever receive 4K on NowTV then the existing smart box 4K might be outdated and newer hardware might be on the market.
