You know as a parent (feels weird to write that) this highlights an entirely weird product oversight for me: is anyone doing shareable low-latency wireless headphones? Because in terms of putting things on your head, that's exactly what me and my wife need - a way to watch things at night without constantly riding the volume control, with shared audio (and microphone pick ups or something so we can talk to each other).
You're totally in luck if you're in the Apple ecosystem. With AirPods, you can do that easily from iOS or on your Apple TV. It's zero-latency in the sense that it automatically delays the video to match the Bluetooth latency, so the image always syncs with sound:
