I would love to see a docking pane under games on my home page that, when clicked, show recent activity. Additionally, it would be great if it highlights when there is new/unseen activity. I personally find myself sometimes missing activity in games because another game gets a lot of activity in a short amount of time and "pushes" the other game off the recent notifications list. This would be a cool way to solve it!

Here are some mockups I made to show how I think it would work

1: Home page, no new game activity
2: Home page, 1 game with new game activity
3: Home page, no new game activity, pane expanded
4: Home page, new game activity, pane expanded option 1
5: Home page, new game activity marked by yellow exclamation points, pane expanded option 2