I cant see how that can help, if the audio is send in the video packets, black screen, pretend 2nd screen, whatever, it will always be seen as a 2nd monitor. You can disable it but you lose the sound.
So unsure what you think Microsoft will do since this is a well known issue for many years.
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Windows 10-1909 | i5-3570k | GTX 1070 Windforce OC Rev2 8GB : 430.64 | Pioneer VSX-534 | Philips 65PUS6703 - 65"
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