You're right that there aren't many truly large-scale seamless MMOs out there, and I agree that this project would help servers scale their worlds.
Sorry if my previous post came off as dismissive, as a game development enthusiast I was focused only on the application to games rather than the technology itself. The point I was trying to make is that even with this technology, we are unfortunately not closer to being able to create real-time action mmos. For an advancement in this area, we need a leap in network capabilities, rather than server efficiency.