I would love to see this ability expand to allow for scheduling to unpublish an item as well. I have had to use Velo to achieve this functionality before but we have had multiple clients that use databases to show things like coupons, etc. and after a specific date, it needs to be removed.
I would also love to see this publishing scheduling system expand to the site itself and individual sections. It would be great if we could use scheduling to hide a section and then show a section after a certain date or vise versa.