Oh my! That'd be splendid!
When doing boring tasks ingame (Hello Castrum roulette!) I usually set it from my soundcard to my HDMI device in the Windows control panel.
This way I can hear the gamesound a bit while watching TV. But as soon as I set from "SoundBlasterZ" to "HDMI", it goes silent. Plugging in and out - silence. When I am not keen on restarting (e.g. Duty Finder) I usually pumped up my headset's sound and put them on my desk.

I hope they really get it right. That is just as annoying as games like Dishonored 2 do not rea-tlime realize when you switch from controller to keyboard and mouse - something almost all games do.