Samsung 4k, YouTube TV, with +50mbps internet.........I see the difference (& I think it's not just because I invested in the TV).
That being said, Samsung has 6, 7, 8, 9 series TV's. I went with Q7 series.........could not see the value in the 8 or 9 series pricing.
I see the difference is slower action shows.......golf, nature shots, football between plays, etc. Fast moving action shots, not so much. I'm sure the quality is there, but there is not enough time to focus & enjoy.