Agreed. When was the last time you actually found malware that was running from the bootloader? I know it can and does happen on occasion, but I've not actually seen it since the days of floppy disks and I doubt anyone I know has either.
Usually when we hear about these things it is some secret service or police force, and I don't expect those organisations will have much trouble signing whatever code they like.
And what about virtualisation? Are we going to see VM BIOS with secure boot? If we do I should think it will be changed to allow remote administration of keys for unattended installs etc. Just one more reason to head for virtualised infrastructure.
This whole UEFI thing is a complete waste of time. But hopefully it will encourage dedicated Linux hardware retailers...ultimately that's how the non-techies prefer to shop anyway.