Cornell, Arxiv and Institutional vs. Central Repositories

No one wants Arxiv to disappear, but I'll bet that within a decade Arxiv will just be an automated harvester of deposits from authors' own institutional repositories, not a locus of direct, institution-external deposit. In the age of Institutional Repositories, it is no longer necessary -- nor does it make sense -- for authors to self-archive institution-externally. It is also a needless central expense to manage deposit centrally. It makes much more sense to deposit institutionally and harvest centrally.