I just purchased this tv-
http://www.bestbuy.com/site/samsung-...?skuId=5217300
This TV has very high ratings but-
Here is what I think-
1) Quality through cable box is simply not good... regular tv is also not good.
2) Video thru streaming services like Netflix / Amazon thru 4K is amazing.
3) Video thru streaming youtube 4k videos is also amazing.
I think the issue is that today's cable boxes suck and no one is yet up to par to 4K technology.