Microsoft's Courier dual-screen tablet uses a full desktop OS underneath, a leak from the project maintains. Just as the company's Surface multi-touch tables use Vista underneath, the new project is seen by Mary Jo Foley as using Microsoft's latest OS and having access to its deeper features. It isn't believed to be just a cosmetic change, however, and would intentionally break compatibility with regular Windows 7 apps; Courier-native third-party apps are a possibility.
