• I discovered with a projector that the bluetooth lag between a speaker and the projector is enough to be disconcerting.

    I think if the lag were consistent, I wouldn’t mind, or even notice. As long as the bandwidth is enough that the video isn’t stuttering, I won’t care that there’s a half-second delay when I press play/pause. It’s when there’s not enough bandwidth, or there’s a lag difference between audio & video that things are problematic.

    But I can watch YouTube videos on my phone at 2160p over WiFi just fine. What makes you say it won’t be? A projector that size isn’t going to do 4k justice anyway - does it need the bandwidth to handle it? I’d honestly be surprised if UHD came out of something that small with any noticeable difference than 1060p.