Via Android dev blog, a new app for the Android Market is on the way to Android phones and tablets. The new client should allow users to buy books and movies but it might be limited at some country at the moment.
“The new Market client is designed to better showcase top apps and games, engage users with an improved UI, and provide a quicker path to downloading or purchasing your products. For developers, the new Android Market client means more opportunities for your products to be merchandised and purchased.”
Here is a video showcasing the changes