Nokia prototype with a large screen and Windows Phone 8

The network has a photo of a prototype smartphone by Nokia. Unfortunately all you can say is that in the picture with the Nokia big screen diagonal. It works under OS Windows Phone 8, which clearly indicates the presence of tile Family Room, which can not be in the version of WP 7.8. You can not even say with certainty that it is a prototype of the future system, it is possible that this is one of the options failed Nokia Lumia 920.