IE11 trident rendering engine was already renamed to "Edge", press F12 check it out (then see in the bottom bar -> top right). The step from IE11 to IE12 aka Edge from the render engine is not as huge an outside might think (reading only the PR) - it's still a great step forward so don't get me wrong. The GUI window app has been completely scrapped in favor of a WinRuntime app "Edge" instead of the old iexplore.exe that code can be traced back to at least Internet Explorer 3 (and maybe even IE 1).