Personally I don't believe the charts because there's such a wide range of what people are sensitive to. Still, in 2016, I am having to replace composite cables with HDMI cables for people on their 50" HDTV's. There are some people who have no idea about PQ & think "big = good", even if they're running VHS tapes over a yellow RCA jack on a 1080p flat-screen.
I have a 43" 4K in my kitchen & it's awesome. Works great as both a computer monitor & for watching stuff while I'm cooking. For reference, I have the Insignia model with the Roku built-in from Best Buy & love it.