[dimnsionofsound]

Before I turned that on, watching BBC documentaries in 25 FPS the judder was very noticeable on panning shots. Definitely worth enabling if your device supports it.

[jiggawatts]

At least Apple TV supports this feature, even if it's off by default.

Google simply "decided" for Chromecast users that 60 Hz is fine and that nobody needs 24 fps or 50 fps content.