One thing I can't find any concrete info on, is it possible to skip the prores ingest and edit AVCHD natively? It'd be nice for FCP to do what the other NLE's do to save the hardrive space.
I don't know what was unclear here. They said very clearly that there was no transcoding involved during editing (though how it would handle transcoding for final output was an open question).
From following the discussions and pre-show speculations, it was clear that jettisoning QuickTime was the only way a lot of what we saw could happen. That seems like exactly what's happened. Thus, a lot of things like importing into ProRes are no longer necessary. (And now FCP can do what an iPhone 4 can do. Huzzah.)