There is one thing that irks me about both Gnome Shell and Unity as far as DE's go, the fact that you have to stop what you're doing to bring up the global application launcher.
Wouldn't something like KRunner (opens in a little bar on top of the screen) be a far better way to approach this?
Just saying, while they are trying to make launching applications this way faster, the full screen launcher approach isn't the way to go.