Nokia N910 will be based on Windows 8. It is expected to be officially announced on H2 2012 with retail price of about 600 euros. It will be the first step of incoming line of Windows 8 devices from Nokia.The Nokia Lumia N910 will have about 4.8 inch touchscreen with a resolution of 720p. It is likely that there will be a standard Nokia polycabonate chassis with some new color options.
Nokia N910 will have an A-GPS functionality and comes pre-loaded with new Navteq maps that will also be partly available in offline mode. The device has a at least 10 megapixel camera with Carl Zeiss lens and powerfull LED flash. The device will most likely have the Bluetooth version 4 and it will be pre loaded with more software than any Nokia device so far. Note that this all is unconfirmed information.
Nokia N9 information