This sound like very good news for the people who have no interest in paying for Dresden setting material and character writ-ups when they plan to either have a game set in a different part of or time period the Dresden world, in which case much of the setting write-up material would be superflous, or don't plan to play in the Dresden setting at all (just look at how variously the SotC rules were used) and mostly just want Fate 3.0 with some tweaks and rules for fantasy stuff.
I know I'm buy the rulebook the first chance I get, but I'm not sure what I'll run it for, probably either modern day Dresdenverse Seoul or heavily Nehwon-inspired Sword and Sorcery. Hell, I'd happily pay for the rulebook for the magic rules alone but I don't think I'd ever use a single character write-up for anything except giving players examples of good aspects.