Though what's also ridiculous is how we still didn't manage to have a proper non-proprietary TCP/IP (Or UDP?) A/V protocol where you can just stream anything anywhere. What seems particularly tricky is to achieve perfectly synced streams where you could theoretically stream left/right channels of a stereo signal to different devices (of different brands). Each device would need to report back their effective latencies (including buffers) so that some sort of central controller can orchestrate everything perfectly. Either that or attempt to achieve extreme negligible stable latencies that approach analog accuracy.

Please correct me if I'm wrong. I would love to hear the details.