Say that you're working on some tracks on the S3.
You want to jump to your VCA layout or any other layout for that matter, make some quick adjustments for balance, maybe mute/solo a couple of things,
It would be great to be able to hop back to where you were. As it stands, you have to go searching for the track that you were focused on again.
This would be similar to 'restore last selection' in the edit window.
Work ---> flip to a layout/make adjustments ---> flip back and continue