According to Gawker Apple said that in the "forthcoming "Lion" Mac OS, Apple will be locking down top tier apps on the Mac similar to how apps are locked down on the iPad and iPhone.
Jobs announced a "Mac Apps Store" to mirror the App Store for iPhones and iPad. Just as on the original App Store, Mac App Store will give 30% of sales to Apple and 70% to app creators. And like App Store, beset with accusations of censorship and controversies over the app approval process, Mac App Store will be curated by Apple."
The whole Apple mantra is that it "just works." This ensures when you buy something from Mac Apps Store, just like iTunes store, you know that it'll run flawlessly on your device.
With this, Apple's signaling clearly that it wants to grow the Garden of Steven -- is
"where iPhone and iPad apps live, and where iTunes Store is located. It's a place that's clearly expanding; it's where Mac App Store will open and where Launchpad will live. It's a bubble that users and developers choose to enter, where a fairly high degree of censorship is expected and accepted. It's where Apple gets to tell hackers how to code and rock bands how to behave. "Freedom" means something different in the Garden of Steven: it's about freedom from porn and spyware, not freedom to freely express yourself or download whatever you like. It's a lot like Disneyland, go figure."