that looks good, but still doesn't solve what i mean. this
alt+tab or dash also requires a button to be pressed in order
to be visible. in that case, it's just easier to press the
activities button and see everything at once.
my point was that there should be some reminder, which is
visible always, even when you're not switching between
windows, or not in activities.
It is planned that application icons (in alt-tab and in the
dash) will
show a number indicating pending notifications.
See for example the Evolution icon in
http://git.gnome.org/browse/gnome-shell-design/plain/mockups/static/app-switcher.png
Giovanni