A:Answer We have a 60" Samsung 4K TV, & are on Direct TV. While we haven't gotten a 'REAL', $K program, I can tell you that we have had no problems with any program we have watched.
The old re-runs all come in as though in HD, The newer programs are even better.
There is no problem detecting errors in the actor's make-up,( skin blemishes).
I'm not an expert, but this is the best we've had todate.
Good Luck on getting the same results.