Apple TV 4K 2017 model.
I reckon the 25fps frame rate flicker is like the DLP projector rainbow effect. Some people are just immune to it, and for others its unwatchable. I'm certain if you and I stood in front on the same screen playing the same content from the same source, I would see it and you might not.
I have the non 4k (3rd gen?) - I have a late model Panasonic plasma and I find Plasma tends to be a bit more forgiving at times of compression "flaws" etc. I tend to be pretty picky - I've never seens a DLP projector but always figured I would see it as I always saw the horizontal lines on Sony Trinatron CRT monitors that were supposed to be the rolls royce of screens at the time but we're all different.
As I said - I was quite dissapointed with the flicker on some motion on the samsung TV but that could have been more about the TV. Some people with flash new Samsung TV's seem to like them looking like the showroom mode with everything driven up full and that can be incredibly unforgiving of flaws too.
I got a six month 20% discount and I have to say I feel the platform is good value at $30 where the $40 it normally is always feels a little steep but we're literally a Rugby only household and even then its Canterbury and Allblack matches pretty much exclusively so 2 games a week is the most we'd watch. Can't stomach paying the Sky satellite rates for that. I wish they'd just see if they stopped dicking around with all the temporary discounts for new users that people get and drop the minute they run out and charge an overall fairer price their subscription rate would probably go through the roof.
Hopefully we'll keep seeing improvements in the codecs and bandwidth etc. I certainly haven't seen something I'd put down to bandwidth for quite some time - My wife bitches about it from time to time when it goes blank and I have to point out the graphic overlay is still there so its a site broadcast issue - We see more of that (Australian games especially) than anything from the stream.