In a step that unifies the Android Market design, to a more uniform experience across all platforms, Google has announced plans to update the Android Market. The design of the Market mirrors that of the Android Market on the Android tablets running Honeycomb. Plans are that within the next few weeks a OTA (over the air) update will be available. New additions to the Market include Google Books and Google Movies. Google Books gives you access to the Google Books store without having to go thru the app, and Google Movies allows you to rent movies. Multiple accounts are supported for those who have different accounts for different devices, or just multiple Google accounts.
via ~ Official Google Blog