Whatever hoops the Linux Foundation had to waddle through to get an MS-signed bootloader for use on Windows 8 hardware, it appears to have worked. Whereas Ubuntu and Fedora already had UEFI Secure Boot support, and there was the Shim bootloader and other fixes for smaller distros, this official solution promises to be more user friendly and universal, albeit with a few caveats that are described by MJG59 at the link below. Once you're sure you want it, head over to the source with a USB key and do the honors.