They mean you could put code into your UEFI to apply the patch using these instructions on every boot, as opposed to the state of affairs until now, when you ne

They mean you could put code into your UEFI to apply the patch using these instructions on every boot, as opposed to the state of affairs until now, when you needed an external debugger connected via DCI to do the same thing. The CPU still needs to be in the Red state, which means you need to control ME. This applies to both cases.