Patent explains the radial context menu as seen in Microsoft Courier’s promotional demo UI videos. The context menu is designed to suit touch interfaces by showing the frequently used options more prominently for quick access.
Microsoft NUI guru Bill Buxton demonstrated what looks like Microsoft’s Courier tablet PC’s User Interface in action.
new images of the Microsoft Courier tablet show SMS and Social features.
Apple’s Knowledge Navigator was indeed an inspiration for the Codex.
video and images of Microsoft Tablert PC Courier’s prototype named Codex.