Nice to see Larry on again.
Just switched audio between my onboard AC97 chipset and my Audigy, with this video running. Normally you'd have to start up the video again, but on 6801 it keeps on going.

Nice.
@Bas depends on the hardware, if you've got a headphone out jack on a soundcard or an amp, it'll switch over in hardware. If I understand right - if this is handled in software you could even with headphones plugged in - switch over to speakers, which you can't do if its handled in hardware on the soundcard or amp. Then of course you've got USB and Bluetooth devices, which the bulk of this I suspect is aimed at.