Windows Phone 8.1 Update 1 is now rolling out to those enrolled in the Preview for Developers program. Enthusiasts and developers can try out the latest version of Microsoft's mobile operating system by participating in the program. This update introduces new features, like Live Folders on the Start Screen, and also introduces support for new device resolutions. Developers will want to grab the new Windows Phone 8.1 Update 1 SDK and emulators to test against those resolutions.
Head to the Windows developer site and you'll find the Windows Phone 8.1 Update 1 SDK and emulators package now available. It adds the following to an existing installation of Visual Studio 2013 Update 2 or later: