iPad's App Store gets search filters

Apple yesterday added a new feature in the iPad App Store. The new search filters appear as a toolbar at the top of search results pages. The filters allow users to search by category, release date, customer rating, price, and device compatibility. These filters also aren't yet available on the desktop version of the App Store, so right now the iPad seems like the best way to search for apps. The second change shows the previously-purchased applications. Typically, results have been displayed with a button showing the price of the app.  Now the results for apps already installed on the device are displayed with an inactive button simply saying "installed".