Along with the Windows 8 RTM announcement, Microsoft today opened up the Windows Store for paid apps. From today, a company can in a supported market can now submit a Metro style app for Windows 8 (Companies qualify through account registration, which includes an account verification process). Also on August 15, Microsoft will be making the build available to MSDN/TechNet subscribers. Also Microsoft is expanding the Store catalog to many new countries and also supporting more languages for developers.
Read more at Windows Store blog.