The document provides an introduction to Windows 8 and Metro style apps. It discusses that Metro style apps are designed for touch input and require a screen resolution of at least 1024x768. It also lists some key points for developing Metro style apps such as eliminating failures, using supported APIs, and optimizing launch time and suspend performance. The document further explains the architecture of Metro style apps, comparing their models to desktop apps in terms of views, controllers, and system services. It ends by providing some links for additional resources on developing Metro style apps.