When the "windows" key (for me the "command" key -- I use a Mac BT keyboard), the visible windows are shrunk (but readable) and the I start to type. I can still read the window contents (1920x1080 11" display, 10 point touch). The desktop is not blanked out. On that selection screen, I have fast-start icons, and the desktop selector. Yes, it is "different" but I find it more usable than either Windows or Mac.

Of course, that may be due to familiarity. My primary platform is a mobile device, but I also use Gnome 3 (Fedora) on desktops. We use Mate on RHEL 7 on our larger display configurations (4x4K monitor in a 2x2 grid and 3x4K in horizontal configurations). But, on those configurations, we lock down and don't offer start menus to the end-user at all (kiosk style application).

I do like Gnome 3 for general use, though.