Read this interview at InfoQ
Windows 8 includes new start screen which provide easy access to your contacts, social media channels, e-mails and calendar. It provides an ability to customize and organize the content which should be displayed on the start dashboard.
Windows 8 is optimized for touch which enables you to easily interact with the content using swipe, tap and drag gestures. It also includes several mobile productivity features and enhanced security capabilities such as Trusted Boot and BitLocker. The operating system includes Microsoft Mail, Calendar, SkyDrive, Photos, People and Messaging apps that automatically sync with your Facebook, LinkedIn and Twitter accounts.