I would really like to see a "high altitude" view on all the repos I work with, which ones are ahead or behind remote and by how many, and which have uncommitted files and how many, stashes, etc.
I use the Select Repo pallets for switching repos like projects in ST, and since this is a list of recents, this seems like a useful place to show details like this. Although, a permanent window or a "welcome" screen like the empty-window/open-dialog would be another good candidate. If tabs were on the roadmap, I assume some information like that could be worked into the tabs themselves like unsaved edits in ST tabs.
I started my GUI git work in SourceTree, and it's repo selection window felt very good at giving you a summary of what you might have forgotten to commit or push. I've been using SM exclusively since I bought my license, and really love it, but it seems I've been leaving things uncommitted here and there, where in SourceTree I wouldn't make that mistake so much.
Edit: I wrote this script and added it to my .bashrc so that when I open a new terminal window, I get a summary of what changes I've made that I need to consider committing and pushing. Pass it one or more directories of projects or parent folders.