At the moment the 2 trending dashlets are focused on adding either CVE or Individual KB/Patches. Be nice to have a dashlet template that is device based, so you add a device or group of devices and can show the trending of its vulnbilit against CVE or Patches.
You could then filter much like you can on the patch list by manufacture, release date, OS Type.
From this you can see if you have issues with certain groups of devices being more vulnerable over others.
Hope that makes sense.