Use the iPad Air as a second monitor for Mac and Windows laptops

ZDNetUse the iPad Air as a second monitor for Mac and Windows laptopsZDNetAir Display is not cheap at $19.99 for the iPad ($9.99 for Android), but it's cheaper and easier than buying and carting an external monitor around. Once installed on the iPad, it prompts you to install the host app on the Mac you want to use it with ...