Azure RemoteApp is being discontinued. Read the annoucement.
January 14, 2016 - Premium and Premium Plus are for customers requiring more computing resources for their Windows apps hosted in Azure RemoteApp.
December 11, 2014 - Azure RemoteApp delivers Windows applications from Azure, and it helps IT pros bring scale, agility, and global access to their business applications.
May 12, 2014 - Azure RemoteApp delivers Windows Server session-based applications from Azure. The service is now in public preview and provided at no additional cost during the preview period