Once upon a time, Adam Jackson ajax@redhat.com said:
If there are ARM machines where UEFI and Secure Boot are available, we're going to have tools to do your own trust database management anyway, so why would supporting them be any different from doing the same on x86?
For Windows 8 certification on ARM, Microsoft is going to require UEFI with Secure Boot enabled _and_ no method for users to disable Secure Boot or enroll their own keys (the opposite of x86 where they require a disable method and custom key enrollment support).
Right now, Win8/ARM is a market of zero, but there will be hardware coming.