Full single device for everyone would mean either everyone loudly shouting at their desks from within their noise canceling headphones or the company giving everyone an office with a door. As even Google doesn't do this for their employees, this is the next best thing we can do to save the sanity of our coworkers and respect remote colleagues dialing in by including them in a shared room meeting.
It's a great idea, IMO. You can fit 10-12 of these in the same space as a regular conference room. This solves exactly the problem you're describing.
So it's kinda like sitting in a conference room, except you're talking to other people via a shitty audio quality with latency, random noise, talking over each other due to not seeing each other. You don't even have the benefit of a more ergonomic personal setup like more monitors. When people are in the office, let them do their meetings in person ...