What would be the recommended screen size to get benefit from 4K/HDR ? I currently have a 46" Panny plasma and viewing distance would be 3-4 metres, I could probably go up to 55" without it totally dominating the room, thinking that might not be big enough ? Not considering changing yet until there is more content available and the technology matures a bit more. My internet is not good enough for streaming 4k so would be relying on Ultra Blu ray and broadcasts when (if ) they become available. Probably 12-18 month timescale.