Google+: Huddle with your Browser - does not work...

After submitting some posts, let's take a look at other features:
If you read http://www.google.com/intl/en/+/learnmore/, you can find the following:

This sound nice, so let's try it.
But where is this icon:

Google's demo video shows huddle only on a smart phone. Does this only work with an app?
I was invited to a huddle:

If i click the > and then "join the conversation" i am directed to this page:

So i conclude: There is no huddle for webbrowsers...