You can now device target on Adwords. During campaign setup, if you go to the Device settings screen, it previously only allowed us to choose whether to run a campaign on all devices, or exclusively on mobile devices only. It also had options to targeting advanced options like OS version, etc.
NOW, you can target specific device types as required. It also allows filtering between mobile app/mobile interstitial and mobile web. Same thing for Tablets.
I am testing this for the Heartland campaign, by excluding tablet app and tablet interstitial, as mobile is already excluded on the IO. Ideally, this means that no apps should show up on the placements list.
Image source: http://www.marketingmag.ca