Harmonisation
It is interesting that the ODF Alliance quotes Tim Bray that the world doesn’t need another way to express basic typesetting features. If it is so important, why didn’t ODF just adopt W3C CSS or ISO DSSSL conventions? Why did they adopt the odd automatic styles mechanism which no other standard uses? Now I think the ODF formating conventions are fine, and automatic styles are a good idea. But there is more than one way to make an omlette, and a good solution space is good for users.
My perspective is that harmonisation (which will take multiple forms: modularity, pluralism, base sets, extensions, mappings, round-trippability, feature-matching, convergence of component vocabularies, etc, not just the simplistic common use of a common syntax) will be best achieved by continued user pressure, both on MS and the ODF side, within a forum where neither side can stymie the legitimate needs of other.