I would say that London and New York are the LEAST likely cities to become the global bitcoin hub. They are already the headquarters of the fiat system. If a central bitcoin location were to emerge it would probably by somewhere in the the third world.
Come on maan of course it will be the global bitcoin hub the government of the UK has already decided what it is going to do hence the regulations so their banks feel safer and can get involved more. New york and London will make or break it if it goes to the CITY then very good things ahead as the best financial minds in the world. It will not be let to emerge somewhere in the third world if it was there would be no regulation, plus all the money they have spent on research to better understand it. Last i checked was £12million as a start for research.