It would be awesome to have Alfred appear on all displays at the same time always.
I currently have three displays and many times I need something from Alfred while looking at info from an "inactive" screen, after one second of thinking alfred didn't work, I realize that I have to look for it in my other monitors.
Sure, if I open a file or website, it would open it in the active screen, but still, I would always see alfred appear in front of me.