Is there any way to create a back up for Zune apps?

Hi, Currently apps for Zune or Windows Phone once purchased and downloaded are stored in a folder locally on the system. We can back up that folder in case of Zune HD apps to avoid re-downloading the apps. Will the Windows Store work similarly to the current store models from Microsoft for Windows Phone. What if there's a need to reinstall Windows. Or there's the scenario where the app was downloaded but discontinued and pulled from the Windows Store by the developer. Can once downloaded/purchased apps be restored/added to the Metro Start screen/Windows 8 machine from a local folder by end users? Please make this deployment easy and provide a GUI as well as a command-line to add and deploy multiple apps locally. Using powershell commandlets to manage Metro-style apps is not ideal. Please provide a graphical interface as well for admins and end users.Thank you