It seems that Google is less than happy with the performance of the Android Market, particularly with the amount of applications being purchased aside from a few premium applications.
Google is looking to make a number of changes to the Android Market, in a hope to increase the amount of applications that are purchased, these will adding an in app payment system, similar to the one Apple uses for its iOS apps.
Google will also be looking to make it easier for users to discover new applications, once again similar to the way Apple does it, and Google will also be removing applications from the Android Market which are against their terms of service.
via Engadget