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Truth be told,
I suppose you could have virtual meetings and business interactions that are via voice . This would make it all the more personal I assume. But with a multitude of spoken language barriers, and English being the most used business language in the world, the voice feature will only be an extra feature and not a core utility unlike the thought process behind it. When it truly comes to usefulness, if I must use voice, then VoIP would suit me a lot better for work than a 3D environment.