Nokia Prototype Windows Phone ' Sea Ray' Featuring On Screen Button

Most of us think that this prototype is a complete mock up of the Nokia N9 running Windows Phone 7, but personally I think its true, which prototype is always anything. Maybe it's the same N9 running Mango inside rather then MEEGO, plus I think the on screen is great way to differentiate Nokia Windows Phone with other Brand Windows Phone such as Samsung, HTC, Acer which all have hardware button. Nokia is taking a big step for making on screen button for a smartphone like what tablet have right now for Honeycomb, no physical button