I still don't understand why you would even care about the firmware if you're running Windows. To me, that would be like building a fortified, ultra-secure rear doorway into a run down barn with a gaping hole where the front doors used to be.

If these efforts were even potentially likely to result in open x86 systems someday, I wouldn't be as opposed to them as I am now. But when you have both x86 silicon vendors on record as being contractually and legally unable, let alone unwilling, to allow owner control, all I see is a massive waste of effort with a known incomplete (i.e. partly closed) endgame. Worse, that effort is detracting from other efforts that are providing fully open computing right now, today.

My recommendation has always been to use the commodity x86 world's greatest advantage if you have to use Windows: cost. Get the absolute cheapest possible Windows system you can find that still has enough power to support your clients, plan on replacing it every so often as Windows churns along, and actually invest in a secure, open computer for everything else.

x86 is a closed ISA with closed, locked, signed firmware. All appearances are that it will stay that way permanently, with just enough late-stage open firmware allowed to create sufficient marketing confusion in less technical circles. Why not select and embrace one of the open ISAs for non-Windows computing? Who knows, you might be helping make secure / non-hostile computing happen on a large scale just a little bit faster! :)