For more information about sideloading product activation keys, see Microsoft Volume Licensing.SLMgr
Provisioned apps are specific to the PC and will not roam with the user. You can only install 24 provisioned apps in an image.
Your app can deliver content through its tile, even when its not running. Using these live tiles, your app can provide useful, at-a-glance data to the user, while minimizing battery usage.
http://msdn.microsoft.com/en-us/library/windows/desktop/hh446767(v=vs.85).aspxApp packager (MakeAppx.exe) creates an app package from files on disk or extracts the files from an app package to disk. It is included in Microsoft Visual Studio Express 2012 for Windows 8 and the Windows Software Development Kit (SDK) for Windows 8. Visit Downloads for developers to get them.
http://www.istartedsomething.com/20110405/first-look-at-the-future-of-application-deployment-on-windows-8-appx/AppX Package Format