QuickPick is being kicked out of the App Store.
It doesn’t matter that QuickPick existed years before Launchpad.
QuickPick is Seth’s application and document launcher. Apple has apparently decided to remove/retroactively-reject QuickPick as being too similar to 10.7’s Launchpad.
At least it’s an Mac app, and therefore he can revert to a more traditional sales channel such as selling it via his website. If it were an iOS app however, he’d be shit out of luck.