4k Thoughts

So I recently ripped 4 different 4k discs. I have been playing them on a samsung 4k tv (TV UN50MU6070). The only thing is, I don’t notice a difference between the 4k rip which is 50ish gb mkv file and a 3 or 4 gb mp4 bluray disc. I’m wondering, am I doing something wrong with the rip? When I bring up the info on the plex app while the video is playing, it says it’s running in 4k. Thoughts?