I just posted a new article that documents my experience using a 4k TV as a computer monitor. I walk through the selection process documenting all the pitfalls that I found along the way. Hopefully if any of you are considering doing the same then this will help you make your decisions.
Click here for the article. (http://andybrown.me.uk/2019/03/24/4k-tv-monitor)
Glad to see you are back. I feel that there will be a new project to connect sleep function to the new monitor!