We should applaud Microsoft for taking the initiative in doing Longhorn and WinFS for two reasons: they can uniquely afford to make the staggering investment required to build this stuff, and they are uniquely in a position to create client-side network effects - not only to their sole benefit, but also openly to the benefit of the customer and solution ecosystem. But the latter will only happen if other developers actively participate in leveraging common WinFS schemas, extending them in domain-specific ways, and standardizing additional types. It will be interesting to see whether this activity ultimately comes from the big players (as has the more recent WS work) or from smaller players/disruptors (as has RSS). [via 640KB ought to be enough for anyone]
Interesting from the point of view that metadata isn't about search its about multiple applications being able to work on the same stuff/interoperate because they all understand it at a high level.