Nope, the leaked build has a tick box to enable the Start Screen instead of the Start Menu (or vice versa). Either way it should keep both camps happy.
Not really sure why the need to make it seperate, just have the start menu customisable so it can scale from the simplest of menus all the way upto a fullscreen start screen depending on the user's preferences/customisation and have options for DPI scaling so that for instance on a low res or tablet your start menu could be fullscreen but say you then docked the tablet for a full desktop experience it would be rendered at normal size as a start menu and so on.