Latency issue, in some use cases it’s not acceptable to have 0.1~0.3 sec lag, like racing games or rhythm games.

(Yeah, I know there are some wireless protocols to make latency shorter, but it might cost a lot to buy a supported headphone, and it’s still useless if the phone doesn’t have proper protocol supports.)

1hr? Maybe just wear an action camera, if you can sit well in front of the screen during whole meeting. (j/k)

EDIT: For smartphone, get a selfie stand if you have place to set it up, do not try to hold the phone with your hand for 1 hour.

So it would block screen/video capture, but will it block sound-only capture, too?