Okay, thanks to benny1967 and his deep knowledge of the Hildon spec I'm going to back off my insistence on a nebulous 100,000 foot hardware roadmap.

With a mature, broad OS framework, such a thing *can* become largely moot. I don't think Fremantle is it, but I'll bet Harmattan will be (disclaimer: I have no usable knowledge of Harmattan scope, capabilities, etc).