Gnome Shell Overview-Relayout Branch
The Gnome Shell overview relayout has been merged into the master branch. That means it is now officially part of Gnome Shell. Unfortunately, it doesn't include any elements from the Tiled View mockups we've seen a few days ago but it's probably too soon for that.
I couldn't record a video because every time I try to make a Gnome Shell screencast I end up with a 80% blue screen video, but here are some screenshots I took a few minutes ago: