With OS X 10.7 Lion, Apple’s also bringing a new element to Macs: the Launchpad.
In launchpad, all of your apps neatly arranged in rows. Thinks stacks for app icons, but instead of flying out of your dock, they are neatly arranged — complete with pages — on your desktop. You can even create folders, just like in iOS.
Essentially, Launchpad is an iOS interface layer for OS X for apps. Just another way in which OS X is becoming more iOS-like.