Benedict Evans: “There will be video in everything, just as there is voice in everything, and… then it will disappear inside. You don’t necessarily need an account to join a call, and you generally don’t need an application either, especially on the desktop – you just click on a link in your calendar and the call opens in the browser. Indeed, the calendar is often the aggregation layer – you don’t need to know what service the next call uses, just when it is.” Link