Comment 35 for bug 161960

Windows uses the key for many shortcuts too, but pressing it alone results in the start menu popping up (this is achieved by not bringing up the start menu until the button is released, as opposed to responding immediately when pressed). This is the most common use.

Would such a solution be achievable in Ubuntu without too much plumbing? That way existing applications could continue to use the key as a modifier for shortcuts, while the Applications Menu would pop up if the key was used in isolation of other keys.