Well, a real-life office is like that anyways, at least with open layout.

But I REALLY like their idea of having occasional snapshots of workers not involved in chats, instead of constant video -- first, it's less distracting. But secondly, if they chose the "keyframes" to be ones when you're still, then you can assume they'll never grab you scratching your nose, etc., except for when you're conscious of already being in a chat.