The Microsoft Menlo project, which is a 4.1″ capacitive touchscreen prototype, was recently spotted running on what could very well be Windows Embedded CE 6.0 R2. It was seen to run an example of an app known as Greenfield, where it utilizes an accelerometer and a barometer among others to deliver a more comprehensive in-building navigation capability. While the Menlo’s other attributes were not mentioned, it is worth noting that the app itself will deliver directions involving stairs and elevators instead of mere 2D positioning. There is a possibility that the Menlo could be part or all of a future version of Windows Phone or Windows CE, but only time will tell whether this is so. How many versions of a mobile Windows operating system do you think the world needs?