On the contrary, it all illustrates that there are very limited
economic forces driving the topology towards geographically-based
interconnects.
Ok. Suppose the unthinkable happens and all major networks decide to
interconnect in just a single location. Let's also suppose the number
of multihomers has inflated the routing table to about 10 times the
size a router can handle. This can still be solved as per the
provider-internal aggregation draft by simply installing 10 routers
that all handle 1/10th of the routing table. In this case, the
geographic component buys us nothing. But it doesn't hurt, either.