http://blogs.msdn.com/b/dorischen/archive/2012/12/06/windows-store-app-labs-test-your-apps-on-different-windows-8-devices.aspxWindows Store App Labs are worldwide physical locations where you can access Windows 8 devices , get design help , and meet with Windows experts to make your app great. Test your app on a variety of screen sizes, input methods, and chipsets with the latesten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)