Cinderella (1950) - Technical specifications - IMDb
https://www.imdb.com/title/tt0042332/technical/
Aspect ratio 1.37:1
1.37:1 (Academy ratio).
Only slightly wider than the 4:3 ratio used throughout the silent film era, the Academy Ratio was the standard film ratio in 1932 when “talkies” (aka, films with sound) began.
I've felt that for things linked with my Movies Anywhere account, that iTunes/Apple has a higher quality but I have nothing to back that up.
I'm down with Apple gaming if I can buy a game once and it works (and crosssaves) on my iPhone, iPad, Apple TV, and MacBook
Bonus points for a controller that easily moves between devices like AirPods
Sounds like the product meets it's goals of getting high quality video into the PC, and doesn't limit the HDMI signal as much along the way compared to other solutions.
What do you want to do that 4k60 HDR isn't enough for your video project?
Meh, if you have no ATV, just look for a deal on the current ATV