Is your new 4K TV missing out on the best picture you can get?
I've written before how I discovered my TV wasn't sending through audio properly (see Saving the Sound of Private Ryan). That took me down a path which eventually led me to understanding where and when I could access the improved colour quality of Dolby Vision in my home system. It's not as easy as you think because unless every part of the chain supports Dolby Vision, you won't see it.
I've summarised my learning in Dolby Vision takes some work but is worth it.