Prepare to drop it. I don't believe that there are any 4K-capable platforms which don't use
the Netflix common UI, featuring a Post-play dialog which pops up as soon as the credits start. All of the 4K-capable Netflix platforms that I own have the common UI (smart TV, Xbox One S, Roku Premiere+, TiVo Bolt).
I wonder about Chromecast Ultra. Given that its UI is displayed on a phone or tablet, what happens when the credits roll? Anyone know? I'd test with my Chromecast 2, but I just moved and my system's not set up yet.
EDIT: It looks as though
something comes up at the bottom of the screen for auto-next-episode, but what happens if that's disabled or at the end of a movie?
I'm sure that when a 4K-capable Apple TV launches that it will have Apple's custom Netflix UI, which does not shrink credits. (Or at least didn't the last I heard).
EDIT EDIT: It appears that Post-play was added to the ATV Netflix app in July 2014 (see
this image). A bit better than the common UI, since it doesn't shrink the credits nearly as much, but still... Oh well :roll:.