First of all this has got NOWHERE NEAR the publicity of Fischer-Spassky : )
In the future maybe some american kid against the ruling power somewhere else ( sound familiar?) Their is no comparable rivalry in chess today unfortunatly - I would say Carlsen-Kramnik but there would be too many draws.
It has been commented that the current WCH has as much publicity comparable that to the WCH match between Fischer vs Spassky and Kasparov vs Karpov.
If Anand defends his title or Carlsen emerges as WCH, which challenger would do likewise in a future WCH match?