That isn't what Gnome shell does - many window managers can do that and it is mostly useless to me since I have so many windows (that are the same) open - taskbars work easier.

The useful bits of Gnome shell show up when you press the Windows key (far easier than trying to find a spot on a dual screen setup). Sure you get the window selector, but far more usefully you can start typing stuff and it finds useful matches (apps, contacts etc). It also has a nicer notification system, as well as improved 'tray' (whatever they call it).