I was able to test this TV (with my Sony Blu ray player) to see its up-scaling capabilities and came away disappointed.
However, I'm left wondering if it was the TV settings since the salesmen couldn't find the remote.
Instead of getting details, most of what was on the screen came across kinda blocky. (not sure this is the right term)
I took this DVD capture off VLC and manipulated it in Paint.net to show something similar to what I saw.
The Blu ray I brought with me was Criterion's La Notte by Antonioni.
When I tested this Blu on the Samsung RU7100 after the picture was much better.
I'm going back tomorrow to another store location so I'm wondering if there's anything in the settings that would have given such a strange effect.
Hopefully, the next store can find their remote.
Right now I'm left wondering if up-scaling is better done in a 4K player since up-scaling is where TCL might have cut corners to keep the cost down.
I'm also wondering if my old HDMI cable had something to do with the results.