"I’m pleased to announce that the Linux Foundation and its Technical Advisory Board have produced a plan to enable the Linux (and indeed all Open Source based distributions) to continue operating as Secure Boot enabled systems roll out. In a nutshell, the Linux Foundation will obtain a Microsoft Key and sign a small pre-bootloader which will, in turn, chain load (without any form of signature check) a predesignated boot loader which will, in turn, boot Linux (or any other operating system). The pre-bootloader will employ a “present user” test to ensure that it cannot be used as a vector for any type of UEFI malware to target secure systems. This pre-bootloader can be used either to boot a CD/DVD installer or LiveCD distribution or even boot an installed operating system in secure mode for any distribution that chooses to use it. The process of obtaining a Microsoft signature will take a while, but once it is complete, the pre-bootloader will be placed on the Linux Foundation website for anyone to download and make use of."
This means basically that systems using UEFI Secure Boot will still be able to run Operating Systems that don't support Secure Boot. You don't have to use Linux to take advantage of the GRUB(2) boot loader [ http://en.wikipedia.org/wiki/GNU_GRUB ], though it may take a while before stuff like Windows friendly installers & such are available. It'll also likely show up on bootable discs/USB sticks with *nix &/or limited versions of Windows installed, e.g. LiveXP.