The Newsweek ranking of the most 'global' universities has been widely noted. The size of library collection contributes 10% to the overall score. This seems bizarre, but is understandable as it is a readily accessible number.
Maybe, Michigan will rise in future rankings if this becomes based on a library's digital collections ;-)
The piece emphasizes the 'self-consciously' global direction of education. In this context, I wonder will we see greater international collaboration between academic libraries. There does not seem to be significant library activity under the WUN or Universitas 21 umbrellas (maybe I am just not aware of it).