Think about the first time you saw HD TV. Nobody was complaining before that about their viewing experience, but once you experience HD, there's really no going back.
Conversely, by the way, we've become so accustomed to crappy voice quality on mobile devices, legacy audio quality stacks up very nicely, so there's no reason to think there's something better. Of course, there is something better, and HD is a big part of that story. When it comes to conferencing, many other factors impact the experience, and it really takes a holistic approach that goes beyond just having HD audio.
That's what my writeup covers, and if you've had your share of poor conferencing experiences, you'll find this a good read. For transparency, the post is sponsored by Revolabs - they're a really interesting company actually - but the content is mine. As always, comments and sharing are most welcome!