Google replaced this render with a more generic picture. It demonstrates a foldable phone running two instances of Chrome. The taskbar can be seen at the bottom
The taskbar seemingly disappears when an app enters the full-screen mode. Google also seems to be working on improving unfolding animations.
We may see Jumbojack after the first Pixel Fold
What’s a little perplexing is that although the Jumbojack runs Android 12, it includes features that are not expected on other foldable until Android 12.1, such as a new way of handling split-screen. This appears to suggest that this version will arrive before Android 12.1 is introduced. There is also a possibility that it’s nothing more than an internal testing device. The picture will hopefully become clearer as more leaks come in.