the coming App Store for Mac OS X: the next Apple jail?

First it sounds like the App Store will help the users to have a single point, where to find and update apps for OS X. But then: look what it means on iOS, i.e. the iPhone and the iPad: it means: apps will only find their way to your device through Apple's "placet", and finally through the App Store, and Apple will always earn money through 3rd parties' contributions.