Both the dialog text and the button text already make clear that the system will be restarted immediately. And the dialog itself is not a surprise; it doesn't appear unless you (a) have just clicked "Install" for an already-downloaded update or (b) are waiting on the Updates screen for the download to finish.
** Changed in: ubuntu-system-settings (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1361800 Title: Tapping install (on new image update) should prompt for reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-ux/+bug/1361800/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs