Perhaps you should TRY the app store in Lion before responding next time.
I try to post actual facts only (after downloading Lion from the app store on my machines numerous times to be absolutely sure about various scenarios) and when I'm certain of those facts. I dismissed Launchpad during the download process because I found it superfluous; the download progress is better observed within the app store window because it displays more detailed information.
Launchpad displays applications. When you buy the OS at the app store, the Installer (an application) will show the download progress in Launchpad because it is, well, an application.
So, just because it launches to display the download progress and/or the actual new application, it still has nothing to do with the app store because the app store is nothing more than an online vendor of software.
Launchpad makes hunting through an applications folder a thing of the past. Just click the Launchpad icon in the Dock. Click an icon to launch its app. Create folders of similar apps by dragging one app onto another, and delete apps from your system with ease. And all apps downloaded from the Mac App Store are automatically added to Launchpad, ready to go.